SI-7704 Fix partest's test category selection (again)

Looks like multiple, different fixes for this issue managed to break it
again.

Author: soc

src/partest/scala/tools/partest/nest/ConsoleRunner.scala

@@ -133,7 +133,7 @@ class ConsoleRunner(argstr: String) extends {
     val rerunTests = if (isRerun) TestKinds.failedTests else Nil
     def miscTests = partestTests ++ individualTests ++ greppedTests ++ rerunTests
 
-    val givenKinds = standardKinds filter (parsed isSet "--" + _)
+    val givenKinds = standardKinds filter parsed.isSet
     val kinds = (
       if (optAll) standardKinds
       else if (givenKinds.nonEmpty) givenKinds