changed name of extension_class_coerce to standard_coerce,

applied Ullrich's documentation fix for standard_coerce.


[SVN r8356]

libs/python

@@ -1 +1 @@
-Subproject commit 8a5de60b33218a6c66354945f43bbff65e4ab176
+Subproject commit ecdf8e1591508c33e1c303aa145d94918a260369