There are some errors in this topic.
See section "Edit Template Topics and Variable Expansion"
-Af | grep emacs
ps | ... | Formatted date/time. See VarSERVERTIME2
Besides these errors I would somehow like to understand the Twikivars I find in templates only such as %REVTITLE% and %TEXT%.
If there are other special template only variables like these they should be documented somewhere.
The obvious errors fixed in 9017. Only in DEVELOP branch, surprisingly.
Regrading to enhancement for the rest