Move `__method__` to mruby-kernel-ext since it's not ISO method.
pacify MSVC warnings for time.c
Refactoring test to use assert_nothing_raised.
Remove use of mruby-proc-ext method.
Add assert to Exception#inspect test.
Merge pull request #2218 from take-cheeze/move_method

Move `__method__` to mruby-kernel-ext since it's not ISO method.
Merge pull request #2220 from yui-knk/refactor-test

Refactoring test to use assert_nothing_raised.
Merge pull request #2219 from kyab/fix_msvc_warning_time.c

Pacify MSVC warnings for time.c
Merge pull request #2222 from take-cheeze/remove_proc_meth

Remove use of mruby-proc-ext method in core test.
Merge pull request #2221 from yui-knk/add-exception-test

Add exception test
Delete unused NameError#new. And add test.
OP_ENTER fix segmentation fault
Change to raise TypeError (Hash#merge, #merge!)
Merge pull request #2225 from ksss/proc-segv

OP_ENTER fix segmentation fault
Merge pull request #2226 from yui-knk/hash-merge-error

Change to raise TypeError (Hash#merge, #merge!)
Merge pull request #2223 from yui-knk/fix-nameerror

Delete unused NameError#new. And add test.
Add comments to Hash methods
Merge pull request #2228 from suzukaze/add-comments-to-hash

Add comments to Hash methods
Add comment to Hash#each_pair. And change the line

Add comment about ISO.
Current place is misleading so change line No.
Merge pull request #2229 from yui-knk/add-comment-each_pair

Add comment to Hash#each_pair. And change the line