Using git-merge --log to merge commit messages that spawn multiple lines
will produce overlong summary lines.
That's because each summary line for a commit includes the entire commit
message (all lines concatenated).
According to git-fmt-merge-msg(1), --log should 'populate the log
message with one-line descriptions' instead of using the entire commit
Which would make a lot of sense, it's just not working as advertised.
Encountered with git version 220.127.116.11.
http://timj.testbit.eu/ - Free software Author
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