Tim Hunt 802f408f35 MDL-31244, MDL-25063 algebra filter: fix common false positives.
There are two well-known cases where the algebra filter messes up input
that is obviously not meant for the algebra filter:

1. Copy and paste of unified diffs.

2. @@PLUGINFILE@@ tokens in the HTML that are due to be replaced by the
files API.

This fix detects these two cases, and just stops the algebra filter from
replacing them.
2012-08-23 19:14:40 +01:00
..