Update maintainers, manpage and completions.

Autogenerated by the [update-man-completions](https://github.com/Homebrew/brew/blob/HEAD/.github/workflows/update-man-completions.yml) workflow.

completions/bash/brew

@@ -2006,6 +2006,7 @@ _brew_tests() {
     -*)
       __brewcomp "
       --byebug
+      --changed
       --coverage
       --debug
       --generic

completions/fish/brew.fish

@@ -1356,6 +1356,7 @@ __fish_brew_complete_arg 'test' -a '(__fish_brew_suggest_formulae_installed)'
 
 __fish_brew_complete_cmd 'tests' 'Run Homebrew\'s unit and integration tests'
 __fish_brew_complete_arg 'tests' -l byebug -d 'Enable debugging using byebug'
+__fish_brew_complete_arg 'tests' -l changed -d 'Only runs tests on files that were changed from the master branch'
 __fish_brew_complete_arg 'tests' -l coverage -d 'Generate code coverage reports'
 __fish_brew_complete_arg 'tests' -l debug -d 'Display any debugging information'
 __fish_brew_complete_arg 'tests' -l generic -d 'Run only OS-agnostic tests'

completions/zsh/_brew

@@ -1659,13 +1659,14 @@ _brew_test() {
 _brew_tests() {
   _arguments \
     '--byebug[Enable debugging using byebug]' \
+    '(--only)--changed[Only runs tests on files that were changed from the master branch]' \
     '--coverage[Generate code coverage reports]' \
     '--debug[Display any debugging information]' \
     '--generic[Run only OS-agnostic tests]' \
     '--help[Show this message]' \
     '--no-compat[Do not load the compatibility layer when running tests]' \
     '--online[Include tests that use the GitHub API and tests that use any of the taps for official external commands]' \
-    '--only[Run only test_script`_spec.rb`. Appending `:`line_number will start at a specific line]' \
+    '(--changed)--only[Run only test_script`_spec.rb`. Appending `:`line_number will start at a specific line]' \
     '--quiet[Make some output more quiet]' \
     '--seed[Randomise tests with the specified value instead of a random seed]' \
     '--verbose[Make some output more verbose]'

docs/Manpage.md

@@ -1453,6 +1453,8 @@ Run Homebrew's unit and integration tests.
   Include tests that use the GitHub API and tests that use any of the taps for official external commands.
 * `--byebug`:
   Enable debugging using byebug.
+* `--changed`:
+  Only runs tests on files that were changed from the master branch.
 * `--only`:
   Run only *`test_script`*`_spec.rb`. Appending `:`*`line_number`* will start at a specific line.
 * `--seed`:

manpages/brew.1

@@ -2063,6 +2063,10 @@ Include tests that use the GitHub API and tests that use any of the taps for off
 Enable debugging using byebug\.
 .
 .TP
+\fB\-\-changed\fR
+Only runs tests on files that were changed from the master branch\.
+.
+.TP
 \fB\-\-only\fR
 Run only \fItest_script\fR\fB_spec\.rb\fR\. Appending \fB:\fR\fIline_number\fR will start at a specific line\.
 .