list: Fix docs for APPEND to show that elements are optional
list(APPEND) has been able to append nothing since commit a06dcdba
(Allow LIST(APPEND) command to append nothing, 2008-01-16) but the
documentation still used to imply that at least one argument is
required.
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@ -63,7 +63,7 @@ public:
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" list(LENGTH <list> <output variable>)\n"
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" list(LENGTH <list> <output variable>)\n"
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" list(GET <list> <element index> [<element index> ...]\n"
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" list(GET <list> <element index> [<element index> ...]\n"
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" <output variable>)\n"
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" <output variable>)\n"
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" list(APPEND <list> <element> [<element> ...])\n"
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" list(APPEND <list> [<element> ...])\n"
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" list(FIND <list> <value> <output variable>)\n"
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" list(FIND <list> <value> <output variable>)\n"
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" list(INSERT <list> <element_index> <element> [<element> ...])\n"
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" list(INSERT <list> <element_index> <element> [<element> ...])\n"
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" list(REMOVE_ITEM <list> <value> [<value> ...])\n"
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" list(REMOVE_ITEM <list> <value> [<value> ...])\n"
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