+=head3 wildcard (pattern)
+
+For example:
+
+ wildcard ("*.c") ⇒ ["bar.c", "foo.c"]
+
+The single parameter is a wildcard which is expanded into a list of
+files using ordinary globbing rules.
+
+=head3 wrap (wrapper, list)
+
+For example:
+
+ wrap ("*file", ["bar.c", "foo.c"]) ⇒ [*file("bar.c"), *file("foo.c")]
+
+Each element in C<list> is wrapped into a call to C<wrapper(element)>.
+There are two common uses for this: either to add explicit tactics
+(such as C<*file>) to a plain list of strings as in the example above;
+or to turn a list of strings into a list of goal or function calls.
+