newdocs: Collision pages created for the same page.

There are many collision pages generated in Qt Quick:

./qtquick/collision-qtqml-cppclasses-topic.html
./qtquick/collision-qtqml-cppintegration-interactqmlfromcpp.html
./qtquick/collision-qtqml-javascript-qmlglobalobject.html
./qtquick/collision-qtqml-cppintegration-data.html
./qtquick/collision-qtqml-modules-qmldir.html
./qtquick/collision-qtqml-modules-identifiedmodules.html
./qtquick/collision-qtqml-javascript-hostenvironment.html
./qtquick/collision-qtqml-index.html
./qtquick/collision-qtqml-modules-cppplugins.html
./qtquick/collision-qtqml-typereference-topic.html
./qtquick/collision-qtqml-syntax-basics.html
./qtquick/collision-qtqml-documents-definetypes.html
./qtquick/collision-qtqml-javascript-expressions.html
./qtquick/collision-qtqml-syntax-imports.html
./qtquick/collision-qtqml-cppintegration-contextproperties.html
./qtquick/collision-qtqml-syntax-objectattributes.html
./qtquick/collision-number.html
./qtquick/collision-qtqml-modules-topic.html
./qtquick/collision-qtjavascript.html
./qtquick/collision-qml-extending-tutorial-index.html
./qtquick/collision-qtqml-modules-legacymodules.html
./qtquick/collision-qtqml-releasenotes.html
./qtquick/collision-qtqml-typesystem-objecttypes.html
./qtquick/collision-qml-extending-tutorial7.html
./qtquick/collision-qtqml-syntax-signals.html
./qtquick/collision-testcase.html
./qtquick/collision-qtqml-documents-topic.html
./qtquick/collision-qtqml-cppintegration-definetypes.html
./qtquick/collision-qtqml-javascript-resources.html
./qtquick/collision-qtqml-typesystem-basictypes.html
./qtquick/collision-qtqml-javascript-dynamicobjectcreation.html
./qtquick/collision-qtqml-documents-structure.html
./qtquick/collision-qtqml-documents-networktransparency.html
./qtquick/collision-qtqml-syntax-propertybinding.html
./qtquick/collision-qtqml-javascript-topic.html
./qtquick/collision-qtqml-javascript-functionlist.html
./qtquick/collision-qtqml-typesystem-topic.html
./qtquick/collision-string.html
./qtquick/collision-qtqml-cppintegration-exposecppattributes.html
./qtquick/collision-qtqml-syntax-directoryimports.html
./qtquick/collision-date.html
./qtquick/collision-qtqml-documents-scope.html
./qtquick/collision-signalspy.html
./qtquick/collision-qtqml-cppintegration-topic.html
./qtquick/collision-qtqml-javascript-imports.html

They point to the same page.