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b020a9ca
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2024-06-30T13:26:51
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automake: avoid Perl-level warning on empty variable $().
https://lists.gnu.org/archive/html/automake/2024-06/msg00085.html
* lib/Automake/Variable.pm (scan_variable_expansions): recognize
and do nothing if the variable name is empty: $().
* t/varempty.sh: new test.
* t/list-of-tests.mk (handwritten_TESTS): add it.
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