Patch #568124: Add doc string macros.
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 5fd13bc..d711726 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -719,10 +719,10 @@
 	return new;
 }
 
-static char float_doc[] =
+PyDoc_STRVAR(float_doc,
 "float(x) -> floating point number\n\
 \n\
-Convert a string or number to a floating point number, if possible.";
+Convert a string or number to a floating point number, if possible.");
 
 
 static PyNumberMethods float_as_number = {