magit-log-select-arguments: add --graph to default value
And stop hard-coding `--graph' in `magit-commit-squash-internal'. This makes it possible for users NOT to use `--graph' if that has negative effects on performance. On the other hand it also means that all uses of `magit-log-select' now show the graph by default, but the latter might actually be beneficial too. Re #3559.
Showing with 2 additions and 3 deletions