Add specs for Hash#select
Add specs for Hash#select!
Fix Hash#select! for frozen objects
Merge pull request #2278 from kachick/fix-hash-select

Hash#select! returns enumerator when self is a frozen object and no block given
Spanish docs for the 'Ruby' page
Merge pull request #2279 from alfonsocora/master

Spanish docs for the 'Ruby' page
Add a compiler spec for not expanding arrays after a splat
Ensure final array arguments after a splat aren't expanded

Fixes #2260