diff --git a/.travis.yml b/.travis.yml
index 03c423ef2f..8cc6dd6a01 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,4 @@
+# -*- YAML -*-
 # Copyright (C) 2011 Urabe, Shyouhei.  All rights reserved.
 #
 # This file is  a part of the programming language  Ruby.  Permission is hereby
@@ -404,12 +405,3 @@ notifications:
 
   email:
     - ko1c-failure@atdot.net
-
-# Local Variables:
-# mode: YAML
-# coding: utf-8-unix
-# indent-tabs-mode: nil
-# tab-width: 4
-# fill-column: 79
-# default-justification: full
-# End:
diff --git a/benchmark/so_ackermann.rb b/benchmark/so_ackermann.rb
index 7db5be9050..4effa1ecaf 100644
--- a/benchmark/so_ackermann.rb
+++ b/benchmark/so_ackermann.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: ackermann-ruby.code,v 1.4 2004/11/13 07:40:41 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 
diff --git a/benchmark/so_array.rb b/benchmark/so_array.rb
index 2b8fce8f99..767e03db5f 100644
--- a/benchmark/so_array.rb
+++ b/benchmark/so_array.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: ary-ruby.code,v 1.4 2004/11/13 07:41:27 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 # with help from Paul Brannan and Mark Hubbart
diff --git a/benchmark/so_concatenate.rb b/benchmark/so_concatenate.rb
index 873214de7c..4468e20ac8 100644
--- a/benchmark/so_concatenate.rb
+++ b/benchmark/so_concatenate.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: strcat-ruby.code,v 1.4 2004/11/13 07:43:28 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 # based on code from Aristarkh A Zagorodnikov and Dat Nguyen
diff --git a/benchmark/so_count_words.yml b/benchmark/so_count_words.yml
index d0a6c8dd3e..99683505f9 100644
--- a/benchmark/so_count_words.yml
+++ b/benchmark/so_count_words.yml
@@ -1,6 +1,5 @@
 prelude: |
   #!/usr/bin/ruby
-  # -*- mode: ruby -*-
 
   wc_input_base = <<EOS
   Subject:      Re: Who was Izchak Miller?
diff --git a/benchmark/so_exception.rb b/benchmark/so_exception.rb
index deb003a594..eb205b4df1 100644
--- a/benchmark/so_exception.rb
+++ b/benchmark/so_exception.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: except-ruby.code,v 1.4 2004/11/13 07:41:33 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 
diff --git a/benchmark/so_matrix.rb b/benchmark/so_matrix.rb
index e2c5c8e559..2d1e72bda9 100644
--- a/benchmark/so_matrix.rb
+++ b/benchmark/so_matrix.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: matrix-ruby.code,v 1.4 2004/11/13 07:42:14 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 
diff --git a/benchmark/so_nested_loop.rb b/benchmark/so_nested_loop.rb
index a0513f8c47..766fcf7b84 100644
--- a/benchmark/so_nested_loop.rb
+++ b/benchmark/so_nested_loop.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: nestedloop-ruby.code,v 1.4 2004/11/13 07:42:22 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 # from Avi Bryant
diff --git a/benchmark/so_object.rb b/benchmark/so_object.rb
index e8607c7199..131f44624c 100644
--- a/benchmark/so_object.rb
+++ b/benchmark/so_object.rb
@@ -1,5 +1,5 @@
 #!/usr/bin/ruby
-# -*- mode: ruby -*-
+# -*- Ruby -*-
 # $Id: objinst-ruby.code,v 1.4 2004/11/13 07:42:25 bfulgham Exp $
 # http://www.bagley.org/~doug/shootout/
 # with help from Aristarkh Zagorodnikov
diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index 58619fae7e..78f3143cd5 100755
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -1,4 +1,4 @@
-"exec" "${RUBY-ruby}" "-x" "$0" "$@" || true # -*- mode: ruby; coding: utf-8 -*-
+"exec" "${RUBY-ruby}" "-x" "$0" "$@" || true # -*- Ruby -*-
 #!./ruby
 # $Id$
 
diff --git a/complex.c b/complex.c
index 64065b68cc..38a1907aac 100644
--- a/complex.c
+++ b/complex.c
@@ -2295,9 +2295,3 @@ Init_Complex(void)
 
     rb_provide("complex.so");	/* for backward compatibility */
 }
-
-/*
-Local variables:
-c-file-style: "ruby"
-End:
-*/
diff --git a/insns.def b/insns.def
index 80d1e81423..4840a44083 100644
--- a/insns.def
+++ b/insns.def
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8 -*-
+/* -*- C -*-
   insns.def - YARV instruction definitions
 
   $Author: $
diff --git a/lib/monitor.rb b/lib/monitor.rb
index 999795c3d0..90847cf330 100644
--- a/lib/monitor.rb
+++ b/lib/monitor.rb
@@ -316,8 +316,3 @@ end
 #    directly in the RDoc output.
 #  - in short, it may be worth changing the code layout in this file to make the
 #    documentation easier
-
-# Local variables:
-# mode: Ruby
-# tab-width: 8
-# End:
diff --git a/rational.c b/rational.c
index f668cc4691..af990b9c46 100644
--- a/rational.c
+++ b/rational.c
@@ -2799,9 +2799,3 @@ Init_Rational(void)
 
     rb_provide("rational.so");	/* for backward compatibility */
 }
-
-/*
-Local variables:
-c-file-style: "ruby"
-End:
-*/
diff --git a/tool/ruby_vm/controllers/application_controller.rb b/tool/ruby_vm/controllers/application_controller.rb
index ba8f15a0c1..25c10947ed 100644
--- a/tool/ruby_vm/controllers/application_controller.rb
+++ b/tool/ruby_vm/controllers/application_controller.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/helpers/c_escape.rb b/tool/ruby_vm/helpers/c_escape.rb
index 2f73b8889f..3e2bf2e02c 100644
--- a/tool/ruby_vm/helpers/c_escape.rb
+++ b/tool/ruby_vm/helpers/c_escape.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/helpers/dumper.rb b/tool/ruby_vm/helpers/dumper.rb
index ae2a0145cf..c0a45b19e2 100644
--- a/tool/ruby_vm/helpers/dumper.rb
+++ b/tool/ruby_vm/helpers/dumper.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/helpers/scanner.rb b/tool/ruby_vm/helpers/scanner.rb
index 410b02eff5..593271a415 100644
--- a/tool/ruby_vm/helpers/scanner.rb
+++ b/tool/ruby_vm/helpers/scanner.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/loaders/insns_def.rb b/tool/ruby_vm/loaders/insns_def.rb
index f83cc77fa1..a7d27ad06a 100644
--- a/tool/ruby_vm/loaders/insns_def.rb
+++ b/tool/ruby_vm/loaders/insns_def.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/loaders/opt_insn_unif_def.rb b/tool/ruby_vm/loaders/opt_insn_unif_def.rb
index 0f5de69930..aa6fd79e79 100644
--- a/tool/ruby_vm/loaders/opt_insn_unif_def.rb
+++ b/tool/ruby_vm/loaders/opt_insn_unif_def.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/loaders/opt_operand_def.rb b/tool/ruby_vm/loaders/opt_operand_def.rb
index 3022f9915d..29aef8a325 100644
--- a/tool/ruby_vm/loaders/opt_operand_def.rb
+++ b/tool/ruby_vm/loaders/opt_operand_def.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/loaders/vm_opts_h.rb b/tool/ruby_vm/loaders/vm_opts_h.rb
index d28db4eaa2..3f05c270ee 100644
--- a/tool/ruby_vm/loaders/vm_opts_h.rb
+++ b/tool/ruby_vm/loaders/vm_opts_h.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/attribute.rb b/tool/ruby_vm/models/attribute.rb
index f9e158ac41..cc16a5f898 100644
--- a/tool/ruby_vm/models/attribute.rb
+++ b/tool/ruby_vm/models/attribute.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/bare_instructions.rb b/tool/ruby_vm/models/bare_instructions.rb
index 2767f383e6..302c375589 100755
--- a/tool/ruby_vm/models/bare_instructions.rb
+++ b/tool/ruby_vm/models/bare_instructions.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/c_expr.rb b/tool/ruby_vm/models/c_expr.rb
index 923651a26b..073112f545 100644
--- a/tool/ruby_vm/models/c_expr.rb
+++ b/tool/ruby_vm/models/c_expr.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/instructions.rb b/tool/ruby_vm/models/instructions.rb
index 5a04190a19..1198c7a4a6 100644
--- a/tool/ruby_vm/models/instructions.rb
+++ b/tool/ruby_vm/models/instructions.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/instructions_unifications.rb b/tool/ruby_vm/models/instructions_unifications.rb
index aa8cef1bd5..214ba5fcc2 100644
--- a/tool/ruby_vm/models/instructions_unifications.rb
+++ b/tool/ruby_vm/models/instructions_unifications.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/operands_unifications.rb b/tool/ruby_vm/models/operands_unifications.rb
index 184bb7d79c..1bc1a2a153 100644
--- a/tool/ruby_vm/models/operands_unifications.rb
+++ b/tool/ruby_vm/models/operands_unifications.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/trace_instructions.rb b/tool/ruby_vm/models/trace_instructions.rb
index fc904a11b5..4ed4c8cb42 100644
--- a/tool/ruby_vm/models/trace_instructions.rb
+++ b/tool/ruby_vm/models/trace_instructions.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/models/typemap.rb b/tool/ruby_vm/models/typemap.rb
index 7c5c872d7c..65ddfea41d 100644
--- a/tool/ruby_vm/models/typemap.rb
+++ b/tool/ruby_vm/models/typemap.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/scripts/insns2vm.rb b/tool/ruby_vm/scripts/insns2vm.rb
index 564d91cd2d..8325dd364f 100644
--- a/tool/ruby_vm/scripts/insns2vm.rb
+++ b/tool/ruby_vm/scripts/insns2vm.rb
@@ -1,5 +1,5 @@
 #! /your/favourite/path/to/ruby
-# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- Ruby -*-
 # -*- frozen_string_literal: true; -*-
 # -*- warn_indent: true; -*-
 #
diff --git a/tool/ruby_vm/views/_attributes.erb b/tool/ruby_vm/views/_attributes.erb
index 9229f1a5ce..89a89817af 100644
--- a/tool/ruby_vm/views/_attributes.erb
+++ b/tool/ruby_vm/views/_attributes.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_c_expr.erb b/tool/ruby_vm/views/_c_expr.erb
index cebe4d7a5d..4e1b0ec883 100644
--- a/tool/ruby_vm/views/_c_expr.erb
+++ b/tool/ruby_vm/views/_c_expr.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_copyright.erb b/tool/ruby_vm/views/_copyright.erb
index a449b0b735..d1d445724f 100644
--- a/tool/ruby_vm/views/_copyright.erb
+++ b/tool/ruby_vm/views/_copyright.erb
@@ -1,4 +1,4 @@
-%# -*- mode: c; style: ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %;
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_insn_entry.erb b/tool/ruby_vm/views/_insn_entry.erb
index 05299d1006..b790729611 100644
--- a/tool/ruby_vm/views/_insn_entry.erb
+++ b/tool/ruby_vm/views/_insn_entry.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_insn_len_info.erb b/tool/ruby_vm/views/_insn_len_info.erb
index abbdb2e92c..cc5889646d 100644
--- a/tool/ruby_vm/views/_insn_len_info.erb
+++ b/tool/ruby_vm/views/_insn_len_info.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_insn_name_info.erb b/tool/ruby_vm/views/_insn_name_info.erb
index f690a7b0c7..bcf570717f 100644
--- a/tool/ruby_vm/views/_insn_name_info.erb
+++ b/tool/ruby_vm/views/_insn_name_info.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_insn_operand_info.erb b/tool/ruby_vm/views/_insn_operand_info.erb
index f6b6565d59..6a28cac4f4 100644
--- a/tool/ruby_vm/views/_insn_operand_info.erb
+++ b/tool/ruby_vm/views/_insn_operand_info.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_insn_stack_increase.erb b/tool/ruby_vm/views/_insn_stack_increase.erb
index 84f5dbc935..315d695cf1 100644
--- a/tool/ruby_vm/views/_insn_stack_increase.erb
+++ b/tool/ruby_vm/views/_insn_stack_increase.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_insn_type_chars.erb b/tool/ruby_vm/views/_insn_type_chars.erb
index b3eff5624f..fb0e091241 100644
--- a/tool/ruby_vm/views/_insn_type_chars.erb
+++ b/tool/ruby_vm/views/_insn_type_chars.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_leaf_helpers.erb b/tool/ruby_vm/views/_leaf_helpers.erb
index 2b59b7653b..ef54a2268b 100644
--- a/tool/ruby_vm/views/_leaf_helpers.erb
+++ b/tool/ruby_vm/views/_leaf_helpers.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2018 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_mjit_compile_insn.erb b/tool/ruby_vm/views/_mjit_compile_insn.erb
index 9ba0ffc1c3..26c011ecd5 100644
--- a/tool/ruby_vm/views/_mjit_compile_insn.erb
+++ b/tool/ruby_vm/views/_mjit_compile_insn.erb
@@ -1,4 +1,4 @@
-% # -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+% # -*- C -*-
 % # Copyright (c) 2018 Takashi Kokubun.  All rights reserved.
 % #
 % # This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_mjit_compile_insn_body.erb b/tool/ruby_vm/views/_mjit_compile_insn_body.erb
index 675f06f80f..aec748385a 100644
--- a/tool/ruby_vm/views/_mjit_compile_insn_body.erb
+++ b/tool/ruby_vm/views/_mjit_compile_insn_body.erb
@@ -1,4 +1,4 @@
-% # -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+% # -*- C -*-
 % # Copyright (c) 2018 Takashi Kokubun.  All rights reserved.
 % #
 % # This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_mjit_compile_ivar.erb b/tool/ruby_vm/views/_mjit_compile_ivar.erb
index f1963c23f7..d8d77f3d36 100644
--- a/tool/ruby_vm/views/_mjit_compile_ivar.erb
+++ b/tool/ruby_vm/views/_mjit_compile_ivar.erb
@@ -1,4 +1,4 @@
-% # -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+% # -*- C -*-
 % # Copyright (c) 2018 Takashi Kokubun.  All rights reserved.
 % #
 % # This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_mjit_compile_send.erb b/tool/ruby_vm/views/_mjit_compile_send.erb
index 40d803af7a..fa022af791 100644
--- a/tool/ruby_vm/views/_mjit_compile_send.erb
+++ b/tool/ruby_vm/views/_mjit_compile_send.erb
@@ -1,4 +1,4 @@
-% # -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+% # -*- C -*-
 % # Copyright (c) 2018 Takashi Kokubun.  All rights reserved.
 % #
 % # This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_notice.erb b/tool/ruby_vm/views/_notice.erb
index 8c6cdaf533..d17e019727 100644
--- a/tool/ruby_vm/views/_notice.erb
+++ b/tool/ruby_vm/views/_notice.erb
@@ -1,4 +1,4 @@
-%# -*- mode: c; style: ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %;
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_sp_inc_helpers.erb b/tool/ruby_vm/views/_sp_inc_helpers.erb
index 3ec20d0246..6308107e9f 100644
--- a/tool/ruby_vm/views/_sp_inc_helpers.erb
+++ b/tool/ruby_vm/views/_sp_inc_helpers.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2018 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/_trace_instruction.erb b/tool/ruby_vm/views/_trace_instruction.erb
index 30933a6f5a..be2b091d48 100644
--- a/tool/ruby_vm/views/_trace_instruction.erb
+++ b/tool/ruby_vm/views/_trace_instruction.erb
@@ -1,4 +1,4 @@
-%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# -*- C -*-
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
 %# This file is a part of  the programming language Ruby.  Permission is hereby
diff --git a/tool/ruby_vm/views/insns.inc.erb b/tool/ruby_vm/views/insns.inc.erb
index 78dddd69d1..29981a8a2d 100644
--- a/tool/ruby_vm/views/insns.inc.erb
+++ b/tool/ruby_vm/views/insns.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
diff --git a/tool/ruby_vm/views/insns_info.inc.erb b/tool/ruby_vm/views/insns_info.inc.erb
index cdca908a69..532cdbaa88 100644
--- a/tool/ruby_vm/views/insns_info.inc.erb
+++ b/tool/ruby_vm/views/insns_info.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
diff --git a/tool/ruby_vm/views/mjit_compile.inc.erb b/tool/ruby_vm/views/mjit_compile.inc.erb
index b2ba3ca240..05c32deab2 100644
--- a/tool/ruby_vm/views/mjit_compile.inc.erb
+++ b/tool/ruby_vm/views/mjit_compile.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 % # Copyright (c) 2018 Takashi Kokubun.  All rights reserved.
 % #
diff --git a/tool/ruby_vm/views/opt_sc.inc.erb b/tool/ruby_vm/views/opt_sc.inc.erb
index fdc9ee3d08..e58c81989f 100644
--- a/tool/ruby_vm/views/opt_sc.inc.erb
+++ b/tool/ruby_vm/views/opt_sc.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
diff --git a/tool/ruby_vm/views/optinsn.inc.erb b/tool/ruby_vm/views/optinsn.inc.erb
index 1cb09d4809..676f1edaba 100644
--- a/tool/ruby_vm/views/optinsn.inc.erb
+++ b/tool/ruby_vm/views/optinsn.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
diff --git a/tool/ruby_vm/views/optunifs.inc.erb b/tool/ruby_vm/views/optunifs.inc.erb
index 29d8ca2855..e92a95beff 100644
--- a/tool/ruby_vm/views/optunifs.inc.erb
+++ b/tool/ruby_vm/views/optunifs.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
diff --git a/tool/ruby_vm/views/vm.inc.erb b/tool/ruby_vm/views/vm.inc.erb
index 24181fab95..c1a3faf60a 100644
--- a/tool/ruby_vm/views/vm.inc.erb
+++ b/tool/ruby_vm/views/vm.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#
diff --git a/tool/ruby_vm/views/vmtc.inc.erb b/tool/ruby_vm/views/vmtc.inc.erb
index 16886a1ea6..99cbd92614 100644
--- a/tool/ruby_vm/views/vmtc.inc.erb
+++ b/tool/ruby_vm/views/vmtc.inc.erb
@@ -1,4 +1,4 @@
-/* -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- */
+/* -*- C -*- */
 
 %# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
 %#