Merge pull request tjackiw#6 from MichaelWhi/patch-1

only defines "be_profane" if RSpec is loaded

Author: tjackiw

Diff for: lib/obscenity/rspec_matcher.rb

@@ -1,5 +1,7 @@
-RSpec::Matchers.define :be_profane do |expected|
-  match do |actual|
-    Obscenity.profane?(actual) == expected
+if defined?(RSpec::Matchers)
+  RSpec::Matchers.define :be_profane do |expected|
+    match do |actual|
+      Obscenity.profane?(actual) == expected
+    end
   end
 end