Issue #17418: specify that buffer sizes are bytes as soon as possible.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 99f8335..93d35f8 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -868,8 +868,8 @@
*buffering* is an optional integer used to set the buffering policy. Pass 0
to switch buffering off (only allowed in binary mode), 1 to select line
buffering (only usable in text mode), and an integer > 1 to indicate the size
- of a fixed-size chunk buffer. When no *buffering* argument is given, the
- default buffering policy works as follows:
+ in bytes of a fixed-size chunk buffer. When no *buffering* argument is
+ given, the default buffering policy works as follows:
* Binary files are buffered in fixed-size chunks; the size of the buffer is
chosen using a heuristic trying to determine the underlying device's "block