Patch #449815: Set filesystemencoding based on CODESET.
diff --git a/Doc/api/api.tex b/Doc/api/api.tex
index a185509..b3a32d1 100644
--- a/Doc/api/api.tex
+++ b/Doc/api/api.tex
@@ -3020,7 +3020,11 @@
as the ones of the builtin unicode() Unicode object constructor.
Setting encoding to NULL causes the default encoding to be used which
-is UTF-8.
+is \ASCII{}. The file system calls should use
+\var{Py_FileSystemDefaultEncoding} as the encoding for file
+names. This variable should be treated as read-only: On some systems,
+it will be a pointer to a static string, on others, it will change at
+run-time, e.g. when the application invokes setlocale.
Error handling is set by errors which may also be set to NULL meaning
to use the default handling defined for the codec. Default error