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This commit triggers precmd and chpwd hook functions iff we changed directory.

This has the same behavior as zsh's hook function execution, which tries to run
the functions in the order specified and silently ignores any function that
does not exist.

See http://zsh.sourceforge.net/Doc/Release/Functions.html#Hook-Functions

Also moved duplicate nopushdminus logic to the `switch-to-dir` function.

Detect system Ruby in default `PATH`, and provide "system" completion if found.

Tested with [the Dockerfile](https://gist.github.com/franklinyu/b8deda6a5093a17b575679b5808b371f).

This commit fixes the runtime error that says:

  prompt_status:2: symbols: attempt to assign array value to non-array

It trips over a local array which is not properly declared.

This PR fixes the runtime error that displays this:

```log
prompt_status:2: symbols: attempt to assign array value to non-array
```.

It trips over a local array which is not properly declared.

Fixes the broken bottom "Logging" section of the table

The options for kdialog in KDE use double dashes

This change had the unintended consequence of overriding the functions to ensure
that application mode was set to use $terminfo sequences, introduced in #6449.

Fixes #7137

Remove Optional Static Type Checker's (mypy) cache files

Remove Optional Static Type Checker's (mypy) Cache Files on `pyclean`

Also fixed minor typo

Closes #6108
Co-authored-by: Matt <sifrawr@gmail.com>

If a number is passed without explicitly passing `-l`, it will now behave
as if using the history builtin, instead of throwing an error.

- Add `gflfp` as an alias for `git flow feature publish`
- Update README.md documentation

Added aliases for iPhone 7, 7 Plus, 8, 8 Plus, SE, and X

Allow the ref names to have differents colors if they are remote refs
or local refs, and another color for HEAD
(use the same coloring scheme as --decorate option)