ca53c3fdcf
Languages like Lua and SQL use "--" to mark a line as commented out. If this appears at column 0 and is part of the pre-image we may see "--- foo" in the diff, indicating that the line whose content is "-- foo" has been removed from the new version. git-gui was incorrectly parsing "--- foo" as the old file name in the file header, causing it to generate a bad patch file when the user tried to stage or unstage a hunk or the selected line. We need to keep track of where we are in the parsing so that we do not misread a deletion or addition record as part of the header. Reported-by: Alexander Gladysh <agladysh@gmail.com> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>