Rephrasing comments.

src/prune_theorems.c

@@ -353,14 +353,14 @@ so technically this is a bug. Don't use.
 	}
     }
 
-  // Check for c-minimality
+  // Check for redundant patterns
   {
     if (!non_redundant ())
       {
 	if (switches.output == PROOF)
 	  {
 	    indentPrint ();
-	    eprintf ("Pruned because this is not <=c-minimal.\n");
+	    eprintf ("Pruned because the pattern is redundant.\n");
 	  }
 	return true;
       }