renamed ruby files to .rb

so rubocop cop catches these in her net

.travis.yml

@@ -33,7 +33,7 @@ script:
   - set -e
   - >
     if [ "${STATIC_CHECKS}" = "true" ]; then
-      ./script/check_static
+      ./script/check_static.rb
     else
       bundle exec rake db:migrate --trace;
       bundle exec rspec --tag $RSPEC_TAG spec/;

script/check_contributors_md.rb

@@ -1,8 +1,8 @@
 #!/usr/bin/env ruby
 
 puts "Checking to see if you're in CONTRIBUTORS.md..."
-if ENV['TRAVIS'] then
-  if ENV['TRAVIS_PULL_REQUEST'] then
+if ENV['TRAVIS']
+  if ENV['TRAVIS_PULL_REQUEST']
     require 'httparty'
     repo = ENV['TRAVIS_REPO_SLUG']
     pr = ENV['TRAVIS_PULL_REQUEST']
@@ -18,20 +18,20 @@ if ENV['TRAVIS'] then
   end
 else
   author = `git config github.user`.chomp
-  if $?.exitstatus > 0 then
-    abort %{
+  if $?.exitstatus.positive?
+    abort %(
 Couldn't determine your GitHub username, and not in a Travis PR build
 Please set it using
 
     git config --add github.user [username]
-}
+)
   end
 end
 
-unless system('grep', '-i', author, 'CONTRIBUTORS.md') then
-  abort %{
+unless system('grep', '-i', author, 'CONTRIBUTORS.md')
+  abort %(
 Thanks for your contribution, #{author}!
 Please add your name and GitHub handle to the file CONTRIBUTORS.md,
 commit it, and update your PR.
-  }
+  )
 end

script/check_static.rb

@@ -2,7 +2,7 @@
 
 checks = [
   'overcommit -r',
-  'bundle exec script/check_contributors_md'
+  'bundle exec script/check_contributors_md.rb'
 ]
 
 return_values = checks.collect { |t| system(t) }