Implement `NoMethodError#args`.

Fix indent in String#casecmp comments

Add comments in String#lstrip, rstrip, strip, lstring_bang, rstrip_bang ...

Fix mgem test args passing

Remove space.

Fix indent.

Fix typos in gc

Remove space.

Improve `Struct#[]=`.

Fix invalid array initialize for VS2012

fix indent.

Replace assert_true with assert_equal.

Exception#exception fix test

Fix assert_equal argument order in test/t/proc.rb

Use `assert_*` method instead of using result value in fiber test.

Use `assert_kind_of` instead in `Proc#inspect` test.

fix typo.

Exception.exception is not call Exception#exception.
Test for Exception#exception should call Exception#exception method.

Use `do ... end` for test block.