wording fix in comment

Author: gzoller

compiler/src/dotty/tools/dotc/fromtasty/NonTastyScalaCompilationUnit.scala

@@ -5,8 +5,9 @@ import dotty.tools.dotc.util.NoSource
 
 /**
  * A marker CompilationUnit to return up the call stack from ReadTasty.  This will tell us that we've
- * encountered, and attempted to inspect, a Java class file.  We can't TASTy-inspect a Java class obviously,
- * but we want to return the fact we found it so that higher-up we can take appropriate action if desired.
+ * encountered, and attempted to inspect, a non-Tasty Scala class file (for example a legacy class pre-Scala 3).  
+ * In this case we still want to return the fact we found it so that higher-up we can take appropriate 
+ * action if desired.
  */
 class NonTastyScalaCompilationUnit(val className: String) extends CompilationUnit(NoSource) {
   override def toString: String = s"Non-Tasty Scala class file $className"