To format the current paragraph:
- gwap same, but restores cursor position
- Thanks to anon who pointed out that gwap makes the original tip obsolete (I have removed it).
- We don't have any other tips that explain basics of paragraph formatting, so this may as well be it.
- Need to explain what "format" means here.
- Need to mention textwidth, formatexpr, formatprg and probably more (but keep it simple).