Summary:
Depends on D21001. Ref T13490.
- Require "--" to terminate arguments when running noninteractively.
- Don't correct spelling when running noninteractively (we still suggest corrections).
- Remove old "phage" wrapper script.
- Fix an issue where "argv" could implicitly generate a parseable "--argv" flag.
- Accept "--" as an argument terminator even when there is no argument list.
- Update some strings to use more modern quoting style.
- Make workflows decline to handle signals by default.
- Allow "arc weld" to weld non-UTF8 files together.
Test Plan: Ran various commands. Welded non-UTF8 files.
Maniphest Tasks: T13490
Differential Revision: https://secure.phabricator.com/D21002
Summary: Ref T13395. Moves all remaining code in "libphutil/" into "arcanist/".
Test Plan: Ran various arc workflows, although this probably has some remaining rough edges.
Maniphest Tasks: T13395
Differential Revision: https://secure.phabricator.com/D20980
