Improve pull request URL regexp

 - use a regexp literal and avoid escaping forward slashes
 - escape the period in "github.com"
 - match only hex characters in the commit part
 - allow hyphen in usernames and repo names, matching what we allow for
   tap names
 - avoid unnecessary capture

1 files changed, 1 insertions, 1 deletions

diff --git a/Library/Contributions/cmd/brew-pull.rb b/Library/Contributions/cmd/brew-pull.rb
index c8bc74049..f6f17a211 100755
--- a/Library/Contributions/cmd/brew-pull.rb
+++ b/Library/Contributions/cmd/brew-pull.rb
@@ -29,7 +29,7 @@ ARGV.named.each do |arg|
     end
 
     url = url_match[0]
-    issue = url_match[4]
+    issue = url_match[3]
   end
 
   if tap_name = tap(url)