Merge pull request #3089 from pda/fix-typo-in-around-context-warning

Fix minor typo in `around(:example)` warning (unbalanced backtick)

lib/rspec/core/hooks.rb

@@ -461,7 +461,7 @@ def register(prepend_or_append, position, *args, &block)
             # TODO: consider making this an error in RSpec 4. For SemVer reasons,
             # we are only warning in RSpec 3.
             RSpec.warn_with "WARNING: `around(:context)` hooks are not supported and " \
-                            "behave like `around(:example)."
+                            "behave like `around(:example)`."
           end
 
           hook = HOOK_TYPES[position][scope].new(block, options)