bash-completion: upstream fix for GNU extended regex

This bug is fixed in HEAD, but the patch doesn't apply cleanly to the
1.x source so we can't link directoy to the commit.

Formula/bash-completion.rb

@@ -8,6 +8,10 @@ class BashCompletion < Formula
   mirror 'http://pkgs.fedoraproject.org/repo/pkgs/bash-completion/bash-completion-1.3.tar.bz2/a1262659b4bbf44dc9e59d034de505ec/bash-completion-1.3.tar.bz2'
   sha1 '6a46b93f44c56cc336632ab28d90c0595fbcc98f'
 
+  # Backports the following upstream patch from 2.x:
+  # http://anonscm.debian.org/gitweb/?p=bash-completion/bash-completion.git;a=patch;h=50ae57927365a16c830899cc1714be73237bdcb2
+  def patches; DATA; end
+
   def compdir
     etc/'bash_completion.d'
   end
@@ -37,3 +41,18 @@ class BashCompletion < Formula
     EOS
   end
 end
+
+__END__
+diff --git a/bash_completion b/bash_completion
+index 6601937..5184767 100644
+--- a/bash_completion
++++ b/bash_completion
+@@ -1334,7 +1334,7 @@ _known_hosts_real()
+ 
+     # append any available aliases from config files
+     if [[ ${#config[@]} -gt 0 && -n "$aliases" ]]; then
+-        local hosts=$( sed -ne 's/^[ \t]*[Hh][Oo][Ss][Tt]\([Nn][Aa][Mm][Ee]\)\{0,1\}['"$'\t '"']\{1,\}\([^#*?]*\)\(#.*\)\{0,1\}$/\2/p' "${config[@]}" )
++        local hosts=$( sed -ne 's/^['"$'\t '"']*[Hh][Oo][Ss][Tt]\([Nn][Aa][Mm][Ee]\)\{0,1\}['"$'\t '"']\{1,\}\([^#*?]*\)\(#.*\)\{0,1\}$/\2/p' "${config[@]}" )
+         COMPREPLY=( "${COMPREPLY[@]}" $( compgen  -P "$prefix$user" \
+             -S "$suffix" -W "$hosts" -- "$cur" ) )
+     fi