Lyric lines should not end with a period.
Apple Music lyric guidance explicitly excludes commas and periods at line endings. The current Genius guide separately requires question marks for questions and uses exclamation marks for excitement, but does not state the same blanket ban. Removal is preview-only so quotations, abbreviations, and intentional delivery remain reviewable.
Example
[Verse]
A lyric line.[Verse]
A lyric line!The fix
In the workbench this finding carries one control, labelled Remove the period. The change is contextual, so it is previewed as a diff in your document first and applies only when you confirm it.
Sources
The guidelines this rule enforces, as cited on every finding it reports:
Review guidelines for submitting lyrics verified No periods or commas at the end of lyric lines
Question and exclamation marks verified Punctuation for questions and exclamations