Stub @implementation added in 0001 was never removed when 0004
added the full implementation, causing Clang to error:
reimplementation of category 'InteractiveSpans'
Remove the stub block in 0004 (interactive span elements for Tab).
The original commit a4adced9b5 had its commit message accidentally
polluted with the entire Emacs git log (~15MB). The cherry-pick script
copied this bloat into the new 0002 patch. Regenerated 0002 with a
clean ChangeLog-only commit message (1385 bytes).
B4: Shorten all subject lines to <=50 chars (preference from CONTRIBUTE).
B3: Fix intermediate BUF_CHARS_MODIFF state in 0002: use BUF_MODIFF
from the start, eliminating the wrong-then-corrected pattern across
patches 0002+0007.
B2: Wrap long NEWS line in Zoom entry (was 80 chars, now <=79).
B1: Long block_input comment already fixed by 0004 in both branches;
confirmed no change needed in final state.
N1: Fix DEFVAR doc in 0001 to reflect auto-detection at startup.
N3: Convert VoiceOver NEWS bullet list to prose paragraphs.
N2: Skip (existing file uses 80-char separators throughout; changing
only new ones would be inconsistent).
