Update comment (and spacing) in download_strategy.

Library/Homebrew/download_strategy.rb

@@ -52,6 +52,7 @@ class CurlDownloadStrategy <AbstractDownloadStrategy
     end
     return @dl # thus performs checksum verification
   end
+
   def stage
     # magic numbers stolen from /usr/share/file/magic/
     File.open(@dl) do |f|
@@ -74,6 +75,7 @@ class CurlDownloadStrategy <AbstractDownloadStrategy
       end
     end
   end
+
 private
   def chdir
     entries=Dir['*']
@@ -82,6 +84,7 @@ private
       when 1 then Dir.chdir entries.first rescue nil
     end
   end
+
   def ext
     # GitHub uses odd URLs for zip files, so check for those
     rx=%r[http://(www\.)?github\.com/.*/(zip|tar)ball/]
@@ -118,6 +121,7 @@ class SubversionDownloadStrategy <AbstractDownloadStrategy
       puts "Repository already checked out"
     end
   end
+
   def stage
     # Force the export, since the target directory will already exist
     args = [svn, 'export', '--force', @co, Dir.pwd]
@@ -126,7 +130,9 @@ class SubversionDownloadStrategy <AbstractDownloadStrategy
     safe_system *args
   end
 
-  # currently only used by mplayer.rb
+  # Override this method in a DownloadStrategy to force the use of a non-
+  # sysetm svn binary. mplayer.rb uses this to require a svn that
+  # understands externals.
   def svn
     '/usr/bin/svn'
   end
@@ -143,6 +149,7 @@ class GitDownloadStrategy <AbstractDownloadStrategy
       puts "Repository already cloned to #{@clone}"
     end
   end
+
   def stage
     dst = Dir.getwd
     Dir.chdir @clone do
@@ -187,7 +194,6 @@ class CVSDownloadStrategy <AbstractDownloadStrategy
     FileUtils.cp_r(Dir[HOMEBREW_CACHE+@unique_token+"*"], Dir.pwd)
 
     require 'find'
-
     Find.find(Dir.pwd) do |path|
       if FileTest.directory?(path) && File.basename(path) == "CVS"
         Find.prune
@@ -230,6 +236,7 @@ class MercurialDownloadStrategy <AbstractDownloadStrategy
       puts "Repository already cloned"
     end
   end
+
   def stage
     dst=Dir.getwd
     Dir.chdir @clone do