(two separate commits) docs: fix layout of table, correct paste error, unwrap comments

Ghost User requested to merge (removed):unwrap-and-correct into master

The first commit unwraps some lines that messed up the layout of a table, and corrects a copy-paste error in the comment of the 'first_vmodmap_key' element.

The second commit unwraps the structure comments in several man pages -- terminals can easily be a hundred columns wide these days, no need to make the comments look ugly by hard-wrapping them.

(Please keep the two commits separate.)

Merge request reports