[Bug #532136] Change path in README, as suggested by Ralph Corderoy

Bugfix candidate.
diff --git a/README b/README
index c8c2728..f2689e6 100644
--- a/README
+++ b/README
@@ -648,9 +648,9 @@
 *don't* include the output of "make test".  It is useless.  Run the
 failing test manually, as follows:
 
-	python ../Lib/test/test_whatever.py
+	./python ./Lib/test/test_whatever.py
 
-(substituting the top of the source tree for .. if you built in a
+(substituting the top of the source tree for '.' if you built in a
 different directory).  This runs the test in verbose mode.