Since trailing commas in method argument lists are a syntax error in
1.8, let's enforce the default rule of `TrailingComma`(i.e. `no_comma`)

Closes Homebrew/homebrew#42398.

Signed-off-by: Xu Cheng <xucheng@me.com>

Closes Homebrew/homebrew#42347.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Closes Homebrew/homebrew#42355.

Signed-off-by: Xu Cheng <xucheng@me.com>

I also removed the `-L` flag which is already present in
`HOMEBREW_CURL_ARGS`.

Closes Homebrew/homebrew#42352.

Signed-off-by: Baptiste Fontaine <batifon@yahoo.fr>

Closes Homebrew/homebrew#42345.

- The name of the subdirectory under site-lisp may not be exactly the
  same as the name of the package

- `(normal-top-level-add-subdirs-to-load-path)` adds every subdirectory
  of `default-directory` to the load-path, so users don't have to update
  their load-path for every package they install.

Closes Homebrew/homebrew#42309.

Closes Homebrew/homebrew#42245.

Closes Homebrew/homebrew#42023.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Before
```
$ time brew readall
brew readall  10.63s user 0.36s system 99% cpu 11.003 total
```

After
```
$ time brew readall
brew readall  5.62s user 0.24s system 99% cpu 5.859 total
```

Closes Homebrew/homebrew#42302.

Signed-off-by: Xu Cheng <xucheng@me.com>

Fixes Homebrew/homebrew#42297.

Closes Homebrew/homebrew#42293.

Signed-off-by: Xu Cheng <xucheng@me.com>

Fixes Homebrew/homebrew#42147.
Closes Homebrew/homebrew#42205.

Signed-off-by: Xu Cheng <xucheng@me.com>

Also check stable_prefix when current acitve_spec is not :stable

Ensures we capture Clang's fourth-digit when it exists. This seems to be on pre-release
versions of OS X only, but is the cause of the misdetection of CLT up-to-date status
on 10.11 several weeks ago.

For full explanation, see Homebrew/homebrew#42261.

Closes Homebrew/homebrew#42261.

Also add a `Tap#git?` method to indicate whether the tap is a git
repository.

Closes Homebrew/homebrew#42264.

Signed-off-by: Xu Cheng <xucheng@me.com>

Closes Homebrew/homebrew#42268.

Signed-off-by: Xu Cheng <xucheng@me.com>

Revert: "test-bot: ensure from-source initial installation"

This reverts commit a33c5b9121e66aa650d9d0fc5814202bd26154d0.

You know when your fix ends up causing another problem that you then have to
go fix as well? Yup...

Each has a formula in homebrew/dupes now

Closes Homebrew/homebrew#42212.

Closes Homebrew/homebrew#42190.

Signed-off-by: Xu Cheng <xucheng@me.com>

This reverts commit be55c800d0bf2750902df71d092906b49b49ffce.

Closes Homebrew/homebrew#42073.

Signed-off-by: Baptiste Fontaine <batifon@yahoo.fr>

Closes Homebrew/homebrew#42069.

Signed-off-by: Baptiste Fontaine <batifon@yahoo.fr>

Closes Homebrew/homebrew#41945.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>