Manual page sentence spacing
mdoc(7) pages should have a newline after a sentence ends for proper spacing. We're been emulating that by manually inserting double spaces, but apparently that turns out to be poor style. There's a few cases even where there's single spacing. Use a grep pattern like grep -E '. [^ ]' to find single space cases and a similar one to find double spaces that should be converted to a newline instead. Replace all such occurrences with newlines. This should be done with all punctuation, not just periods. This issue should be trivially fixed with a sed one-liner and a manual inspection of the resulting diff.