Reword [ci skip]

README.md

@@ -387,23 +387,25 @@ Here are some fun facts about this library:
 
 ## Supported Ruby Versions
 This library aims to support and is [tested against][travis] the following Ruby
-version:
+implementations:
 
 * Ruby 1.8.7
 * Ruby 1.9.2
 * Ruby 1.9.3
 * Ruby 2.0.0
 
+If something doesn't work on one of these interpreters, it's a bug.
+
 This library may inadvertently work (or seem to work) on other Ruby
 implementations, however support will only be provided for the versions listed
 above.
 
 If you would like this library to support another Ruby version, you may
 volunteer to be a maintainer. Being a maintainer entails making sure all tests
 run and pass on that implementation. When something breaks on your
-implementation, you will be personally responsible for providing patches in a
-timely fashion. If critical issues for a particular implementation exist at the
-time of a major release, support for that Ruby version may be dropped.
+implementation, you will be responsible for providing patches in a timely
+fashion. If critical issues for a particular implementation exist at the time
+of a major release, support for that Ruby version may be dropped.
 
 ## Versioning
 This library aims to adhere to [Semantic Versioning 2.0.0][semver]. Violations