temp: keep the tox c extensions for ad-hoc use

Author: nedbat

tox.ini

@@ -41,11 +41,11 @@ commands =
     # Create tests/zipmods.zip
     python igor.py zip_mods
 
-    # Remove the C extension so that we can test the PyTracer
-    python igor.py remove_extension
-
-    # Test with the PyTracer
-    python igor.py test_with_core pytrace {posargs}
+    ;# Remove the C extension so that we can test the PyTracer
+    ;python igor.py remove_extension
+    ;
+    ;# Test with the PyTracer
+    ;python igor.py test_with_core pytrace {posargs}
 
     # Build the C extension and test with the CTracer
     python setup.py --quiet build_ext --inplace