Change Details

When "arc diff --create" is executed against several local commits, create one diff for each local commit. It can be enabled with an command option or just set as default. Several engineers (including Girish an me) think the local commits are useful in code review. We may also do similar thing in "arc diff --update" to make it add extra local commit**s**. (Is that "one diff in Revision history" or "one Revision"?)

When you run `arc diff` on a range of commits, we currently smush them all together and discard information. For example, `arc diff HEAD^^^^^` followed by `arc patch` produces a single local commit. Instead, it should produce 5 local commits.

When "arc diff --create" is executed against several local commits, create one diff for each local commit. It can be enabled with an command option or just set as default.you run `arc diff` on a range of commits, Several engineers (including Girish an me) thinkwe currently smush the local commits are useful in code reviewm all together and discard information. We may also do similar thing in "arc diff --update" to make it add extra local commit**s**. (Is that "one diff in Revision history" or "one Revision"?)For example, `arc diff HEAD^^^^^` followed by `arc patch` produces a single local commit. Instead, it should produce 5 local commits.