Fix comment in TestTestRunner.cpp

"Self-recursive" didn't make much sense.

tests/TestTestRunner.cpp

@@ -110,7 +110,7 @@ namespace
         SlowTest test;
         list.Add(&test);
         
-        // Using UnitTest::Timer here is arguably a bit hokey and self-recursive, but
+        // Using UnitTest::Timer here is arguably a bit hokey and self-referential, but
         // it should guarantee that the test time recorded is less than that plus the 
         // overhead of RunTestsIf -- the only thing we can reliably assert without
         // reworking the test to not use sleeps at all
@@ -334,4 +334,4 @@ namespace
         CHECK_EQUAL("suite", reporter.lastStartedSuite);
     }
     
-}
+}