Fix that ./x test --no-doc actually keeps the same behaviour for backwards compatability

[Urhengulas]

In #153143 the ./x test --no-doc flag was renamed to --all-targets. I added a commit that keeps the --no-doc flag for backwards compatibility, but unfortunately I forgot to actually keep the behaviour the same, which is fixed by this PR.

r? @Kobzol

[rustbot]

Kobzol is not on the review rotation at the moment.
They may take a while to respond.

[Kobzol]

Ah, right, good catch. Thanks!

@bors r+ rollup

[rust-bors]

📌 Commit 70f87db has been approved by Kobzol

It is now in the queue for this repository.

🌲 The tree is currently closed for pull requests below priority 1000. This pull request will be tested once the tree is reopened.

[rust-log-analyzer]

The job tidy failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

    ╭▸ src/bootstrap/src/core/config/flags.rs:575:34
    │
575 │                 // for backwards compatability --no-doc keeps working
    ╰╴                                 ━━━━━━━━━━━━━
rerun tidy with `--extra-checks=spellcheck --bless` to fix typos
tidy [extra_checks:spellcheck]: checks with external tool 'typos' failed
tidy [extra_checks:spellcheck]: FAIL
yarn install v1.22.22
warning package.json: No license field
warning ../../package.json: License should be a valid SPDX license expression
warning No license field
[1/4] Resolving packages...
---
linting javascript files
Running eslint on rustdoc JS files
info: ES-Check: there were no ES version matching errors!  🎉
typechecking javascript files
tidy: The following check failed: extra_checks:spellcheck
Bootstrap failed while executing `test src/tools/tidy tidyselftest --extra-checks=py,cpp,js,spellcheck`
Command `/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools-bin/rust-tidy --root-path=/checkout --cargo-path=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo --output-dir=/checkout/obj/build --concurrency=4 --npm-path=/node/bin/yarn --ci=true --extra-checks=py,cpp,js,spellcheck` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/tool.rs:1618:23
Executed at: src/bootstrap/src/core/build_steps/test.rs:1387:29

Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:02:49
  local time: Wed Mar 11 16:41:27 UTC 2026
  network time: Wed, 11 Mar 2026 16:41:27 GMT
##[error]Process completed with exit code 1.
##[group]Run echo "disk usage:"

[JonathanBrouwer]

@bors r-
#153728
Rollup PR ci failed

[rust-bors]

This pull request was unapproved.

This PR was contained in a rollup (#153728), which was unapproved.