This command was used:
find . -type f -print0 | xargs -0 sed -i 's/return undef/return/g'
The idea behind this commit is described on http://oddmuse.org/wiki/Refactoring page.
In short: 'return undef' returns (undef) in list context (a list with one element),
which is wrong.
Oddmuse provides several shortcuts, like ‘e’ to edit page or ‘c’ to open
comments page and several others. In most browsers it means that
pressing Alt+Shift+e should automatically click (or at least focus) edit
link. However, by default there is no way to provide accesskey for links
on your wiki pages. This module is trying to solve this.
