Also add basic test coverage for reading patches from stdin, while here. ok op@

The -h and -V/--version flags must be given before the command; with those flags the command is actually optional, but don't over-complicate the usage string with these nitpicks. ok/improvements stsp@

Spotted by stsp@ while considering a feature request for cmd_integrate. ok stsp@

Make work tree diffs of local changes on disk display the file mode of new added files like other versions of `got diff` currently do. ok stsp@

Similar to `git init -b`. Includes a change to `got import` behaviour such that "main" is no longer hardcoded by default; instead, we import to the branch resolved via the repository's HEAD reference unless `got import -b` is used, and only if HEAD cannot be resolved to a branch do we fallback to "main". includes fix plus ok from stsp@

and adjust the callers. discussed with and ok stsp@

We fail to release the memory for the nodes. To fix it however, we some consumer of the commit graph iterator need to be corrected: the returned pointer is safe to be used only up until the next iter_next call; save a copy it if it's needed afterwards too. ok stsp@

Not everywhere getline does an implicit fflush, so we might end up not showing the prompt to the user. Spotted on alpine with muslc. ok Thomas Adams

ok jrick

ok stsp@

We already have two arguments when diffing two blobs, so check for more than two like we do when diffing two objects to check for invalid path args. Includes new regress test by op for diffing two blobs. ok stsp@ and ok plus regress test from op@

spotted by noticing gotwebd crashing on some blame requests. Diff from stsp@ with a fix from tracey@, I'm committing it only because he is short on time. ok stsp@