Replace deleted eval-at-startup with custom-initialize-delay.
(Pure Storage): Small changes.
(Memory Usage): Copyedit.
+ (Writing Emacs Primitives): Update Fcoordinates_in_window_p and For
+ example definitions. Give examples of things with non-nil
+ interactive args. Mention eval_sub. Remove old info about
+ strings and GCPRO. Mention cus-start.el.
+ (Buffer Internals, Window Internals, Process Internals):
+ Misc small updates and fixes for fields.
* tips.texi: Copyedits.
(Coding Conventions): Mention autoloads.