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Tyler Yankee 67f253a8d2 Help: Factor out "may use generator expressions"
This had already been factored out to `GENEX_NOTE.rst`, but wasn't
applied very widely. Consolidate the language to consistently spell out
(a) the reference to `cmake-buildsystem(7)` and (b) the prose 'with the
syntax "$<...>"'.

To accompany the change, modify cmRST to override redefinitions of
substitutions within a single context instead of appending. Otherwise,
with the new note files, `cmake --help-*` prints repeated fragments
when it collates all scopes of a given field (e.g., all
`prop_*/COMPILE_OPTIONS.rst` from
`cmake --help-property COMPILE_OPTIONS`).
2026-10-13 11:46:56 -04:00

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Arguments to |command_name| may use
:manual:`generator expressions <cmake-generator-expressions(7)>` with the
syntax ``$<...>``. See the :manual:`cmake-buildsystem(7)` manual for more on
defining buildsystem properties.