Review docs prose

Review documentation prose that changed in $ARGUMENTS, or in the working tree and current branch if that is empty.

Two rules govern this whole skill:

• Review the diff, not the page. Prose that was already there is not in scope, however much you would have written it differently.
• Skip rules that do not clearly apply. A short report of real findings is the goal. Do not stretch a rule to reach a finding, and do not restructure prose that is already fine.

Step 1. Resolve the target

Run git fetch origin first so main is current. Resolve in this order: