Addresses issue 2802: 'n' formatting for integers.
Adds 'n' as a format specifier for integers, to mirror the same
specifier which is already available for floats. 'n' is the same as
'd', but inserts the current locale-specific thousands grouping.
I added this as a stringlib function, but it's only used by str type,
not unicode. This is because of an implementation detail in
unicode.format(), which does its own str->unicode conversion. But the
unicode version will be needed in 3.0, and it may be needed by other
code eventually in 2.6 (maybe decimal?), so I left it as a stringlib
implementation. As long as the unicode version isn't instantiated,
there's no overhead for this.
diff --git a/Objects/stringlib/stringdefs.h b/Objects/stringlib/stringdefs.h
index 1e0df0f..daaa2e2 100644
--- a/Objects/stringlib/stringdefs.h
+++ b/Objects/stringlib/stringdefs.h
@@ -23,5 +23,6 @@
#define STRINGLIB_CHECK PyString_Check
#define STRINGLIB_CMP memcmp
#define STRINGLIB_TOSTR PyObject_Str
+#define STRINGLIB_GROUPING _PyString_InsertThousandsGrouping
#endif /* !STRINGLIB_STRINGDEFS_H */