Unify git submodule comments

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/git-flow.rb

@@ -11,7 +11,7 @@ end
 class GitFlow < Formula
   homepage 'https://github.com/nvie/gitflow'
 
-  # Use the tag instead of the tarball to get the submodule
+  # Use the tag instead of the tarball to get submodules
   url 'https://github.com/nvie/gitflow.git', :tag => '0.4.1'
   version '0.4.1'
 

Formula/multimarkdown.rb

@@ -1,8 +1,9 @@
 require 'formula'
 
-# url uses git tag to download submodules.
 class Multimarkdown < Formula
   homepage 'http://fletcherpenney.net/multimarkdown/'
+
+  # Use the tag instead of the tarball to get submodules
   url 'https://github.com/fletcher/peg-multimarkdown.git', :tag => '3.6'
   version '3.6'
 

Formula/wp-cli.rb

@@ -2,6 +2,8 @@ require 'formula'
 
 class WpCli < Formula
   homepage 'https://github.com/andreascreten/wp-cli/'
+
+  # Use the tag instead of the tarball to get submodules
   url 'https://github.com/andreascreten/wp-cli.git', :tag => 'v0.4.0'
   version '0.4.0'