Remove blank trailing comments

For future reference, this is the regex I used: ^\s*#\s*\n(?!\s*#). Replace
with the first match, and voilà! Note that the regex matches a little bit too
much, so you probably want to `git add -i .` and go through every single diff
to check if it actually should be changed.

1 files changed, 0 insertions, 1 deletions

diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index a9253c186d..9636bbccb5 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -341,7 +341,6 @@ module ActiveSupport
 
       # This is used internally to append, prepend and skip callbacks to the
       # CallbackChain.
-      #
       def __update_callbacks(name, filters = [], block = nil) #:nodoc:
         type = filters.first.in?([:before, :after, :around]) ? filters.shift : :before
         options = filters.last.is_a?(Hash) ? filters.pop : {}