Documentation for classDiagram examples: "attribute type" order is backwards compared to UML

[chrisfcarroll]

The documentation text suggests that the class diagram can show correct UML output — which it can! — but in the examples "attributeName type" is the wrong way round (UML has name then type, not type then name) and omits the colons, so that's confusing.

[jgreywolf]

See comment in PR

The way it works right now is that either method will be accepted. Basically, for backwards compatibility, we display these specific values as typed. As previously we supported type only, attribute name only, etc.