`tools/test.py --help` output before: (only relevant parts)
```
-c, --compiler How the Dart code should be compiled or statically processed.
dart2js: Compile to JavaScript using dart2js.
dart2analyzer: Perform static analysis on Dart code using the analyzer.
compare_analyzer_cfe: Compare analyzer and common front end representations.
ddc: Compile to JavaScript using dartdevc.
app_jitk: Compile the Dart code into Kernel and then into an app
snapshot.
dartk: Compile the Dart code into Kernel before running test.
dartkp: Compile the Dart code into Kernel and then Kernel into
AOT snapshot before running the test.
spec_parser: Parse Dart code using the specification parser.
fasta: Compile using CFE for errors, but do not run.
[dart2js, dart2analyzer, dart2wasm, ddc, app_jitk, dartk, dartkp, spec_parser, fasta, dart2bytecode]
-r, --runtime Where the tests should be run.
vm: Run Dart code on the standalone Dart VM.
dart_precompiled: Run a precompiled snapshot on the VM without a JIT.
d8: Run JavaScript from the command line using Chrome's v8.
jsc: Run JavaScript from the command line using Safari/WebKit's jsc.
jsshell: Run JavaScript from the command line using Firefox's js-shell.
firefox:
chrome:
safari:
chromeOnAndroid: Run JavaScript in the specified browser.
none: No runtime, compile only.
[vm, flutter, dart_precompiled, d8, jsc, jsshell, firefox, chrome, safari, edge, chromeOnAndroid, none]
...
-p, --progress Progress indication mode.
Allowed values are:
compact, color, line, verbose, silent, status
[compact (default), color, line, verbose, silent, status]
...
--nnbd Which set of non-nullable type features to use.
Allowed values are: legacy, weak, strong
[legacy, weak, strong (default)]
```
After:
```
-c, --compiler How the Dart code should be compiled or statically processed.
[dart2js] Compile to JavaScript using dart2js.
[dart2analyzer] Perform static analysis on Dart code using the analyzer.
[compare_analyzer_cfe] Compare analyzer and common front end representations.
[ddc] Compile to JavaScript using dartdevc.
[app_jitk] Compile the Dart code into Kernel and then into an app snapshot.
[dartk] Compile the Dart code into Kernel before running test.
[dartkp] Compile the Dart code into Kernel and then Kernel into AOT snapshot before running the test.
[spec_parser] Parse Dart code using the specification parser.
[fasta] Compile using CFE for errors, but do not run.
-r, --runtime Where the tests should be run.
[vm] Run Dart code on the standalone Dart VM.
[dart_precompiled] Run a precompiled snapshot on the VM without a JIT.
[d8] Run JavaScript from the command line using Chrome's v8.
[jsc] Run JavaScript from the command line using Safari/WebKit's jsc.
[jsshell] Run JavaScript from the command line using Firefox's js-shell.
[firefox] Run JavaScript in Firefox.
[chrome] Run JavaScript in Chrome.
[safari] Run JavaScript in Safari.
[chromeOnAndroid] Run JavaScript in Chrome on Android.
[none] No runtime, compile only.
...
-p, --progress Progress indication mode.
[compact (default), color, line, verbose, silent, status]
--nnbd Which set of non-nullable type features to use.
[legacy, weak, strong (default)]
```
Changes:
- Duplicate "allowed values are ..." phrases removed.
- With `package:args`'s `allowedHelp` messages, allowed values documentations are now consistent with the rest of the ecosystem.
Change-Id: I25d5e310e7dd38e0e94622815d9773ec84ab8fb3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/431860
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Ömer Ağacan <omersa@google.com>
Ömer Ağacan
804c6bbd84