Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
# Thanks to http://phaedo.cx/archives/2007/07/25/tools-for-optimizing-your-website-etag-and-expire-headers-in-django-apache-and-lighttpd/ for this.
FileETag MTime Size
# http://www.askapache.com/htaccess/apache-speed-expires.html
<IfModule mod_headers.c>
<FilesMatch "\.(jpg|jpeg|png|gif|js|css)$">
Header set Expires "Wed, 1 Jan 2020 20:00:00 GMT"
</FilesMatch>
</IfModule>
# http://www.askapache.com/htaccess/apache-speed-compression.html
<IfModule mod_deflate.c>
<FilesMatch "\.(js|css)$">
SetOutputFilter DEFLATE
</FilesMatch>
</IfModule>