* Suppress the problematic trap output in check_upg

The newly added trap, in systems where `rm` is aliased to `rm="rm -v"`,
shows a message stating that "update.lock" has been removed each time `zsh` is called.
I simply suppressed it with directing the output to `/dev/null`.

* Use `command` instead of >/dev/null to suppress

Co-authored-by: Babak K. Shandiz <babak.k.shandiz@gmail.com>
Co-authored-by: Marc Cornellà <marc.cornella@live.com>

Also remove unnecesary dramatic remark

Fixes #9103
Co-authored-by: Yufan You <ouuansteve@gmail.com>

* feat(mix-fast): include desctiptions (#8561)

* feat(mix-fast): improve _mix_generate (no tail, better matching)

See https://github.com/ohmyzsh/ohmyzsh/pull/9049#issuecomment-654537347Co-authored-by: Yufan You <ouuansteve@gmail.com>

Fixes #9060 by matching a `@` in the AWS profile name.

See https://github.com/ohmyzsh/ohmyzsh/pull/8807#issuecomment-652697704

Co-authored-by: Marc Cornellà <marc.cornella@live.com>
Co-authored-by: Bartek Pacia <barpac02@gmail.com>

Co-authored-by: Marc Cornellà <marc.cornella@live.com>

`git rev-parse --is-inside-work-tree` does not have a different exit
code when not within a work tree; the difference is in the output,
either "true" when in a work tree, or "false" when not.

The if was modified similarly to the check for the hide-status config,
which also parses command output rather than exit code.
Co-authored-by: Kyle Laker <klaker@easydynamics.com>

Changing 'your' to 'you'

Fixes #8730

DISABLE_UNTRACKED_FILES_DIRTY, DISABLE_AUTO_TITLE, GIT_STATUS_IGNORE_SUBMODULES are not set
Handle these variables not being set with conditional access.

If the user has set -u option to report attempts to use undeclared / unassigned variable, accessing the variables needs to be conditional.

Co-authored-by: Marc Cornellà <marc.cornella@live.com>

* mvn: add mvnfmt alias

* mvn: update README.md

Co-authored-by: Magnus Boman <Kattus@users.noreply.github.com>

skip the update check at initialization if DISABLE_AUTO_UPDATE is set to true

Co-authored-by: Capybara <git.capybara@gmail.com>
Co-authored-by: drootang <drootang@users.noreply.github.com>
Co-authored-by: Augusto Souza <augustorsouza@gmail.com>
Co-authored-by: PatrBal <44707588+PatrBal@users.noreply.github.com>