* ext/bigdecimal/bigdecimal.c: use `RB_TYPE_P(x, t)` instead of
  `TYPE(x) == t`.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38809 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ext/bigdecimal/bigdecimal.c (BigDecimal_to_s): use CRuby style.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38810 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* enumerator.c: Require block for Lazy#{take|drop}_while [Bug #7692]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38811 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* enumerator.c (lazy_flat_map_func): flat_map should call each only
  when the value of a block returns a forcable object.
  [ruby-core:51401] [Bug #7690]

* enumerator.c (lazy_flat_map): add documentation.

* test/ruby/test_lazy_enumerator.rb: related test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38812 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
	* lib/irb/ext/save-history.rb: outputs its history to
	  owner-only-readable file and change the permission of a file that
	  already exists [Bug #7694]. Thanks Nobuhiro IMAI for bug reports.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38813 b2dd03c8-39d4-4d8f-98ff-823fe69b080e