Improve CLI tools suggestion doctor text

Library/Homebrew/cmd/doctor.rb

@@ -230,13 +230,12 @@ def check_for_latest_xcode
 end
 
 def check_cc
-  unless File.exist? '/usr/bin/cc'
-    <<-EOS.undent
-      You have no /usr/bin/cc.
-      This means you probably can't build *anything*. You need to install the CLI
-      Tools for Xcode. You can either download this from http://connect.apple.com/
-      or install them from inside Xcode's preferences. Homebrew does not require
-      all of Xcode! You only need the CLI tools package!
+  unless File.exist? '/usr/bin/cc' then <<-EOS.undent
+    You have no /usr/bin/cc.
+    This means you probably can't build *anything*. You need to install the Command
+    Line Tools for Xcode. You can either download this from http://connect.apple.com
+    or install them from inside Xcode's Download preferences. Homebrew does not
+    require all of Xcode! You only need the Command Line Tools package!
     EOS
   end
 end