Typofix under lib and test, tool directories

lib/ruby_vm/rjit/insn_compiler.rb

@@ -2728,7 +2728,7 @@ module RubyVM::RJIT
       sample_rhs = jit.peek_at_stack(0)
       sample_lhs = jit.peek_at_stack(1)
 
-      # We are not allowing module here because the module hierachy can change at runtime.
+      # We are not allowing module here because the module hierarchy can change at runtime.
       if C.RB_TYPE_P(sample_rhs, C::RUBY_T_CLASS)
         return false
       end

test/ruby/test_compile_prism.rb

@@ -262,8 +262,8 @@ module Prism
     end
 
     def test_ConstantWriteNode
-      # We don't call assert_prism_eval directly in this case becuase we
-      # don't want to assign the constant mutliple times if we run
+      # We don't call assert_prism_eval directly in this case because we
+      # don't want to assign the constant multiple times if we run
       # with `--repeat-count`
       # Instead, we eval manually here, and remove the constant to
       constant_name = "YCT"
@@ -447,8 +447,8 @@ module Prism
     end
 
     def test_ConstantTargetNode
-      # We don't call assert_prism_eval directly in this case becuase we
-      # don't want to assign the constant mutliple times if we run
+      # We don't call assert_prism_eval directly in this case because we
+      # don't want to assign the constant multiple times if we run
       # with `--repeat-count`
       # Instead, we eval manually here, and remove the constant to
       constant_names = ["YCT", "YCT2"]
@@ -1379,7 +1379,7 @@ module Prism
     end
 
     ############################################################################
-    #  Calls / arugments                                                       #
+    #  Calls / arguments                                                       #
     ############################################################################
 
     def test_ArgumentsNode

tool/test-bundled-gems.rb

@@ -48,7 +48,7 @@ File.foreach("#{gem_dir}/bundled_gems") do |line|
 
   when "debug"
     # Since debug gem requires debug.so in child processes without
-    # acitvating the gem, we preset necessary paths in RUBYLIB
+    # activating the gem, we preset necessary paths in RUBYLIB
     # environment variable.
     load_path = true