v1.2.11

• grading: wc/sort/tail no-arg flags no longer glue to operands (false accepts/rejects fixed)
• grading: arithmetic-branch question delimiter fixed (|| alternate graded backwards)
• level 21: invalid find -exec batch alternates corrected to cp/mv -t
• vi: insert-mode history recall cursor fix; arrow keys during pending operator no longer corrupt the line; EOF no longer spins at 100% cpu in timed modes
• scoring: clock-skew timestamps clamped, blank scores line no longer drops entries, stale tier-0 entries pruned so the file stops growing forever
• profile: concurrent instances merge instead of clobbering boss/placement progress
• terminal: quitting from the menu restores paste mode; narrow terminals no longer garble the input line