Fix instructions on how to rebuild some modules
diff --git a/Lib/keyword.py b/Lib/keyword.py
index 8eb2860..69794bd 100755
--- a/Lib/keyword.py
+++ b/Lib/keyword.py
@@ -7,7 +7,7 @@
 To update the symbols in this file, 'cd' to the top directory of
 the python source tree after building the interpreter and run:
 
-    python Lib/keyword.py
+    ./python Lib/keyword.py
 """
 
 __all__ = ["iskeyword", "kwlist"]