Merge pull request #1345 from rspec/smaller-built-gem-size

Don't include any test files in the gem.

Author: JonRowe

rspec-core.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
 
   s.files            = `git ls-files -- lib/*`.split("\n")
   s.files           += %w[README.md License.txt Changelog.md .yardopts .document]
-  s.test_files       = `git ls-files -- {spec,features}/*`.split("\n")
+  s.test_files       = []
   s.bindir           = 'exe'
   s.executables      = `git ls-files -- exe/*`.split("\n").map{ |f| File.basename(f) }
   s.rdoc_options     = ["--charset=UTF-8"]