GIT_HISTORY_COMMIT_FORMAT asked for decorations with %(decorate:…), which
Git 2.43 introduced. Older Git prints the placeholder verbatim and exits
zero, so nothing raised and every commit in the Source Control panel
silently lost its branch, remote and tag badges.
The record now also carries %D (Git 2.10) on its own line, selected by an
exact match against the unexpanded placeholder — a ref name can never
contain the \x1f that Git expands inside the echoed text. %n emits the %D
line on both sides of the boundary, so the message index is fixed and a
missed match degrades to no badges rather than a corrupted message.
The decoration separator is now bound to the field that produced the text
instead of sniffed from it. A lone decoration carries no separator, so the
old sniff split `refs/heads/feat,one` into two bogus refs.
Verified against real Git 2.38.1 and 2.49.1.
Co-authored-by: kaluli123123 <295758798+kaluli123123@users.noreply.github.com>
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