merge revision(s) 54755: [Backport #12313]
* encoding.c: Fix return value of `Encoding::ISO8859_1.name` [Bug #12313][ruby-core:75147][ci skip] * ext/bigdecimal/bigdecimal.c: Fix code sample of `BigDecimal.new`
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54765 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 54755: [Backport #12313]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54765 b2dd03c8-39d4-4d8f-98ff-823fe69b080e