qdoc: Remove zero-width-space characters from function signatures

The extra character was added in 5.4.0 to allow web browsers to
break up long function signatures in a nice manner. However, not
every browser supports it, and it causes problems in some code
editors when copy-pasting the code.

Change-Id: If6a52b92d683788c5e32f40bb8c280d76112723e
Reviewed-by: Martin Smith <martin.smith@digia.com>

src/tools/qdoc/cppcodemarker.cpp

@@ -136,7 +136,7 @@ QString CppCodeMarker::markedUpSynopsis(const Node *node,
 
     if ((style == Detailed) && !node->parent()->name().isEmpty() &&
         (node->type() != Node::Property) && !node->isQmlNode())
-        name.prepend(taggedNode(node->parent()) + "::​");
+        name.prepend(taggedNode(node->parent()) + "::");
 
     switch (node->type()) {
     case Node::Namespace: