Closes #11670: configparser read_file now iterates over f.
diff --git a/Lib/configparser.py b/Lib/configparser.py
index 1bfdac8..edef4f8 100644
--- a/Lib/configparser.py
+++ b/Lib/configparser.py
@@ -694,10 +694,10 @@
def read_file(self, f, source=None):
"""Like read() but the argument must be a file-like object.
- The `f' argument must have a `readline' method. Optional second
- argument is the `source' specifying the name of the file being read. If
- not given, it is taken from f.name. If `f' has no `name' attribute,
- `<???>' is used.
+ The `f' argument must be iterable, returning one line at a time.
+ Optional second argument is the `source' specifying the name of the
+ file being read. If not given, it is taken from f.name. If `f' has no
+ `name' attribute, `<???>' is used.
"""
if source is None:
try: