Fix bad pathname indentation.

Library/Homebrew/extend/pathname.rb

@@ -164,9 +164,9 @@ class Pathname
     /_((\d+\.)+\d+[abc]?)[.]orig$/.match stem
     return $1 if $1
 
-	# brew bottle style e.g. qt-4.7.3-bottle.tar.gz
+    # brew bottle style e.g. qt-4.7.3-bottle.tar.gz
     /-((\d+\.)*\d+)-bottle$/.match stem
-	return $1 if $1
+    return $1 if $1
 
     # eg. otp_src_R13B (this is erlang's style)
     # eg. astyle_1.23_macosx.tar.gz