Help: expand "..." and "?" in logical generator expressions

Expand "..." and "?", which could be mistaken as metacharacters
(and in the explanations of AND and OR actually were meant as
metacharacters).

Help/manual/cmake-generator-expressions.7.rst

@@ -42,19 +42,26 @@ otherwise expands to nothing.
 
 Available logical expressions are:
 
-``$<BOOL:...>``
-  ``1`` if the ``...`` is true, else ``0``
-``$<AND:?[,?]...>``
-  ``1`` if all ``?`` are ``1``, else ``0``
+``$<BOOL:condition>``
+  ``1`` if the ``condition`` is true, else ``0``
 
-  The ``?`` must always be either ``0`` or ``1`` in boolean expressions.
+``$<AND:conditions>``
+  where ``conditions`` is a comma-separated list of boolean expressions.
+  Evaluates to ``1`` if all conditions are ``1``.
+  Otherwise evaluates to ``0``.
+
+``$<OR:conditions>``
+  where ``conditions`` is a comma-separated list of boolean expressions.
+  Evaluates to ``1`` if at least one of the conditions is ``1``.
+  Otherwise evaluates to ``0``.
+
+``$<NOT:condition>``
+  ``0`` if ``condition`` is ``1``, else ``1``
+
+``$<IF:condition,true_value,false_value>``
+  ``true_value`` if ``condition`` is ``1``,
+  ``false_value`` if ``condition`` is ``0``
 
-``$<OR:?[,?]...>``
-  ``0`` if all ``?`` are ``0``, else ``1``
-``$<NOT:?>``
-  ``0`` if ``?`` is ``1``, else ``1``
-``$<IF:?,true-value...,false-value...>``
-  ``true-value...`` if ``?`` is ``1``, ``false-value...`` if ``?`` is ``0``
 ``$<STREQUAL:a,b>``
   ``1`` if ``a`` is STREQUAL ``b``, else ``0``
 ``$<EQUAL:a,b>``