And if you don't know, the wiki is backed by git. You can clone it
with
https://github.com/sympy/sympy.wiki.git (the link is on the
page). You can also use a SSH url g...@github.com:sympy/sympy.wiki.git.
If you have push access to the repo you also have push access to the
wiki. It is often easier to edit pages locally and then push them up.
It's also a lot easier to view the edit history this way.
Aaron Meurer