Use multi-cursor editing

I need to edit three places at once: update the error message in api/handlers/user.js, change the variable name in lib/auth/tokens.js, and add a log line in scripts/migrate.js. Put cursors at the same logical spots and apply the three edits simultaneously so they share the same phrasing.

Before I run the multi-edit, make it simple for reviewers: show where similar error messages exist, surface whether the variable tokenCount is used in arithmetic elsewhere, and flag any migrated scripts that expect the old log format so I can avoid breaking downstream parsing.

I repeatedly use simultaneous cursors to rush through edits and end up with inconsistent naming or missed edge cases. Where am I losing credibility or time, and what practice would stop a bad bulk edit habit? Recommend one rule for when to use multi-cursor and one quick verification step to include in every PR.