* doc/contributing.rdoc:  [DOC] Correct spelling by @dvsuresh [Fixes GH-481]

https://github.com/ruby/ruby/pull/481
[ci-skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: unexpand exec_prefix in rubylibprefix

* configure.in (rubylibprefix): replace exec_prefix as well as
  bindir and libdir.  a patch by kimuraw (Wataru Kimura) at
  [ruby-dev:47852].  [Bug #9160]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44205 b2dd03c8-39d4-4d8f-98ff-823fe69b080e