Auto merge of #9495 - dunkyl:master, r=ehuss

3 typos and some capitalization

3 typos and...

Most of the docs use "command-line" instead of "commandline", changed where it made sense (in plain text).

Most of the docs also use "SemVer" instead of "semver", changed for consistency except for the "semver trick" (consistent with context).

I believe these are the correct files to change, since none of these changes are in doc/man?