diff --git a/ChangeLog b/ChangeLog
index 98b8b5e878..008f7b78b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Sep 26 21:37:21 2016  Akinori MUSHA  <knu@iDaemons.org>
+
+	* man/erb.1, man/irb.1, man/ri.1, man/ruby.1: Remove Ns before
+	  puctuation.
+
 Mon Sep 26 16:23:49 2016  Kazuki Yamaguchi  <k@rhe.jp>
 
 	* ext/stringio/stringio.c (strio_seek): Avoid signed integer overflow.
diff --git a/man/erb.1 b/man/erb.1
index 08f75a4c4b..f98a0273a5 100644
--- a/man/erb.1
+++ b/man/erb.1
@@ -144,8 +144,7 @@ class.
 .Sh REPORTING BUGS
 .Bl -bullet
 .Li Security vulnerabilities should be reported via an email to
-.Aq security@ruby-lang.org Ns
-.Li .
+.Aq security@ruby-lang.org .
 Reported problems will be published after being fixed.
 .Pp
 .Li And you can report other bugs and feature requests via the
diff --git a/man/irb.1 b/man/irb.1
index b167d89b50..fca410c999 100644
--- a/man/irb.1
+++ b/man/irb.1
@@ -160,8 +160,7 @@ Personal irb initialization.
 .Sh REPORTING BUGS
 .Bl -bullet
 .Li Security vulnerabilities should be reported via an email to
-.Aq security@ruby-lang.org Ns
-.Li .
+.Aq security@ruby-lang.org .
 Reported problems will be published after being fixed.
 .Pp
 .Li And you can report other bugs and feature requests via the
diff --git a/man/ri.1 b/man/ri.1
index 0aeb7bca40..01a37a3a1f 100644
--- a/man/ri.1
+++ b/man/ri.1
@@ -167,8 +167,7 @@ Searches user-wide documents here.
 .Sh REPORTING BUGS
 .Bl -bullet
 .Li Security vulnerabilities should be reported via an email to
-.Aq security@ruby-lang.org Ns
-.Li .
+.Aq security@ruby-lang.org .
 Reported problems will be published after being fixed.
 .Pp
 .Li And you can report other bugs and feature requests via the
diff --git a/man/ruby.1 b/man/ruby.1
index f9b21f91cf..28a73e576a 100644
--- a/man/ruby.1
+++ b/man/ruby.1
@@ -396,8 +396,7 @@ debug the Ruby interpreter.
 .It Fl -disable- Ns Ar FEATURE
 .It Fl -enable- Ns Ar FEATURE
 Disables (or enables) the specified
-.Ar FEATURE Ns
-\&.
+.Ar FEATURE .
 .Bl -tag -width "--disable-rubyopt" -compact
 .It Fl -disable-gems
 .It Fl -enable-gems
@@ -643,8 +642,7 @@ Comprehensive catalog of Ruby libraries.
 .Sh REPORTING BUGS
 .Bl -bullet
 .Li Security vulnerabilities should be reported via an email to
-.Aq security@ruby-lang.org Ns
-.Li .
+.Aq security@ruby-lang.org .
 Reported problems will be published after they've been fixed.
 .Pp
 .Li And you can report other bugs and feature requests via the