From e0d6ee863f495a1d7f2ca6368d9e3a149ebcc272 Mon Sep 17 00:00:00 2001
From: Jack Nagel <jacknagel@gmail.com>
Date: Fri, 5 Apr 2013 22:00:36 -0500
Subject: [PATCH] Make some groups non-capturing

---
 Library/Homebrew/cmd/audit.rb | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Library/Homebrew/cmd/audit.rb b/Library/Homebrew/cmd/audit.rb
index afe6167b61..62d1405e09 100644
--- a/Library/Homebrew/cmd/audit.rb
+++ b/Library/Homebrew/cmd/audit.rb
@@ -195,7 +195,7 @@ class FormulaAuditor
     urls = [(f.stable.url rescue nil), (f.devel.url rescue nil), (f.head.url rescue nil)].compact
 
     # Check GNU urls; doesn't apply to mirrors
-    urls.grep(%r[^(https?|ftp)://(?!alpha).+/gnu/]).each do |u|
+    urls.grep(%r[^(?:https?|ftp)://(?!alpha).+/gnu/]).each do |u|
       problem "\"ftpmirror.gnu.org\" is preferred for GNU software (url is #{u})."
     end
 
@@ -230,7 +230,7 @@ class FormulaAuditor
     end
 
     # Check for git:// GitHub repo urls, https:// is preferred.
-    urls.grep(%r[^git://([^/])*github\.com/]).each do |u|
+    urls.grep(%r[^git://[^/]*github\.com/]).each do |u|
       problem "Use https:// URLs for accessing GitHub repositories (url is #{u})."
     end
 
@@ -240,7 +240,7 @@ class FormulaAuditor
     end 
 
     # Use new-style archive downloads
-    urls.select { |u|  u =~ %r[https://.*/(tar|zip)ball/] and not u =~ %r[\.git$] }.each do |u|
+    urls.select { |u| u =~ %r[https://.*/(?:tar|zip)ball/] and not u =~ %r[\.git$] }.each do |u|
       problem "Use /archive/ URLs for GitHub tarballs (url is #{u})."
     end
 
@@ -368,7 +368,7 @@ class FormulaAuditor
     end
 
     # No trailing whitespace, please
-    if text =~ /(\t|[ ])+$/
+    if text =~ /[\t ]+$/
       problem "Trailing whitespace was found"
     end