osh doesn't expand tilde in assignment

[oguz-ismail]

See:

$ osh -c 'x=~ env | grep ^x='
x=~

POSIX says

In an assignment (see XBD Section 4.26), multiple tilde-prefixes
can be used: one at the beginning of the word (that is, following the of the
assignment), or one following any unquoted <colon>, or both. A tilde-prefix in an assignment is
terminated by the first unquoted <colon> or <slash>, or the end of the assignment word.

Which is what every other shell does.

[andychu]

Great report, thank you! This is now fixed and will be out with the next release.

New spec test here, case 13 was failing before the fix - http://travis-ci.oilshell.org/github-jobs/6482/ovm-tarball.wwz/_tmp/spec/osh-py/tilde.html

[andychu]

@AtomsForPeace - I pushed a fix for this

I put some more stuff on #help-wanted in Zulip -- feel free to ask questions about any issue. Thank you for the help!

[andychu]

Released - https://www.oilshell.org/blog/2024/06/release-0.22.0.html