[Bug 4412] Fuzzy-match nonexistent tag and attribute names (did you mean?...)

http://www.w3.org/Bugs/Public/show_bug.cgi?id=4412

           Summary: Fuzzy-match nonexistent tag and attribute names (did you
                    mean?...)
           Product: Validator
           Version: 0.7.4
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: check
        AssignedTo: ot@w3.org
        ReportedBy: ot@w3.org
         QAContact: www-validator-cvs@w3.org


Quite often users of the validator get puzzled at "there is no such attribute
oNClick", because of case-sensitivity of XHTML, or other such typos.

A useful feature would be to append to the message
there is no attribute "onMouseover"
a fuzzy-match saying: 
did you mean "onmouseover?