Improve documentation for multi-argument typemaps and overloading

Doc/Manual/Typemaps.html

@@ -3444,7 +3444,7 @@ list of strings like this:
 
 <div class="targetlang">
 <pre>
-&gt;&gt;&gt; foo(["ale","lager","stout"])
+&gt;&gt;&gt; foo(["ale", "lager", "stout"])
 </pre>
 </div>
 
@@ -3487,6 +3487,11 @@ maps perform the conversion described for the above example:
 %typemap(freearg) (int argc, char *argv[]) {
    if ($2) free($2);
 }
+
+/* Required for C++ method overloading */
+%typecheck(SWIG_TYPECHECK_STRING_ARRAY) (int argc, char *argv[]) {
+  $1 = PyList_Check($input) ? 1 : 0;
+}
 </pre>
 </div>
 
@@ -3554,6 +3559,11 @@ Other directives such as <tt>%apply</tt> and <tt>%clear</tt> also work with mult
 </pre>
 </div>
 
+<p>
+Don't forget to also provide a suitable <a href="#Typemaps_overloading">typemap for overloaded functions</a>, such as <tt>%typecheck</tt> shown for foo above.
+This is only required if the function is overloaded in C++.
+</p>
+
 <p>
 Although multi-argument typemaps may seem like an exotic, little used feature, there
 are several situations where they make sense.  First, suppose you wanted to wrap