C-p and C-n behave like a 'normal' terminal

They bring up the previous or next command.
Unbind M-p and M-n to force me to stop using them.
Unbind M-r, M-p, and M-n in shell-mode

to force me to stop using them
= is a text object between ='s or line boundaries

Cannot exclude spaces before the = at the end of the inner text
object (vi=) due to a limitation in evil where the greedy ' *' doesn't
match as many spaces as possible in the closing text.
Indent all .el files with gI

This commit should not have changed any functionality
Auctex doesn't mess with prooftree indentation