Rename Setup.in to Setup.dist, and assume that configure will create
Setup (instead of creating it from the Makefile).
diff --git a/Misc/Makefile.pre.in b/Misc/Makefile.pre.in
index ca68576..1cc91a1 100644
--- a/Misc/Makefile.pre.in
+++ b/Misc/Makefile.pre.in
@@ -17,7 +17,7 @@
# only withs with Python 1.5, alpha 3 or newer.)
# Create a file Setup.in for your extension. This file follows the
-# format of the Modules/Setup.in file; see the instructions there.
+# format of the Modules/Setup.dist file; see the instructions there.
# For a simple module called "spam" on file "spammodule.c", it can
# contain a single line:
# spam spammodule.c