InreplaceError: fix undefined method crash

brew deps --tree: fix gap in line between reqs and deps

When the first parameter to inreplace was an array, and the replacement
failed, InreplaceError would end up crashing with an undefined method
exception because the order of operations resulted in super not being
passed the value of the entire inject block.

Deprecate brew (un)linkapps.

xcode, xquartz: use default location when possible.

formula: return runtime_dependencies in to_hash.

formulary: read from formula in opt prefix.

Xcode can be installed anywhere but for most people it's in
`/Applications/Xcode.app` so just look there if `xcode-select` isn't
helpful before looking at Spotlight which can return weird results on
e.g. backup disks.

Fixes #1587.

Xcode can be installed anywhere but for most people it's in
`/Applications/Xcode.app` so just look there by default before looking
at Spotlight which can return weird results on e.g. backup disks.

We want to prefer the newer/versioned formulae when possible but this
is preferable to a random cached formula or, worse, no formula.

This means `brew info foo` will never complain that `foo` is a missing
formula.

Which, in turn, provides it for `brew info --json=v1` so other tools
such as e.g. `brew bundle` can make use of this information.

Unfortunately `brew linkapps` cannot behave nicely with e.g. Spotlight
using either aliases or symlinks and Homebrew formulae do not build
"proper" `.app` bundles that can be relocated. Instead, please consider
using `brew cask` and migrate formulae using `.app`s to casks.

audit: check virtualenv and setuptools resource.

bump-formula-pr: check for URL presence.

`virtualenv_install_with_resources` will automatically define and
install a `setuptools` resource so this is unnecessary.

References https://github.com/Homebrew/homebrew-core/pull/8570

If it's not there, produce a nicer error.

Fixes #1805.

keg_relocate: Check HOMEBREW_TEMP's realpath when excluding name changes

Since /tmp (the default HOMEBREW_TEMP) is a symlink to /private/tmp,
some build systems (like Parrot's) will attempt to use the realpath
instead of the literal /tmp we supply it with. This breaks the relocation
code, which only tested the literal HOMEBREW_TEMP and not its realpath.

Allow `brew audit` to fake a Safari user-agent.

This allows us to detect if homepages such as e.g. `aiccu` which
blocks `curl` are up or not.

Revert "uses: properly handle untapped formulae in recursive dependency expansion"

uses: properly handle untapped formulae in recursive dependency expansion

PerlRequirement: Perl version string may lack parentheses

Whitelist PHP formulas in shadowed header audit check

Revert "cc: always filter flags on deps."

keg: use resolved_path not realpath.

This guards against this being a non-symlink in which case it will fail.

Fix abv and prefix_linked?

Use docs.brew.sh links.

formula: correct grammar in comments

docs: fix titles on docs.brew.sh