meson/docs/markdown/snippets/subproject-foreach.md

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## Add new `meson subprojects foreach` command
`meson subprojects` has learned a new `foreach` command which accepts a command
with arguments and executes it in each subproject directory.
For example this can be useful to check the status of subprojects (e.g. with
`git status` or `git diff`) before performing other actions on them.