Clarify comment in write-only code
Fix long line & add comments to sentence_forward/sentence_backward
Pattern: Some tweaks to “more like”

Allow completions without line break after “more like”
Reduce trailing number of line breaks allowed
Pattern: Disable multi-line (squashed to one line with elipses) rules (they seem a bit too wordy for now)
Integrate line-break-limiting logic into Markov sentence_forward/backward routines

Ensure starting (seed) word/phrase can't get
chopped off when removing excess lines from
output

Eliminate possibility of empty completions
still resulting from chopping off lines
immediately following seed, even with empty
completions disabled