[2.7] bpo-29526: Add reference to help('FORMATTING') in format() builtin (GH-166). (#3492)
(cherry picked from commit 2e6bb4484ee1b0da67d1dfcf0816c58602daa5a0)diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 70308e9..0f2ee4a 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -374,7 +374,9 @@
"format(value[, format_spec]) -> string\n\
\n\
Returns value.__format__(format_spec)\n\
-format_spec defaults to \"\"");
+format_spec defaults to the empty string.\n\
+See the Format Specification Mini-Language section of help('FORMATTING') for\n\
+details.");
static PyObject *
builtin_chr(PyObject *self, PyObject *args)