Patch #552812: Better description in "python -h" for -u.
diff --git a/Misc/python.man b/Misc/python.man
index 5cd8816..2aa1de8 100644
--- a/Misc/python.man
+++ b/Misc/python.man
@@ -138,7 +138,11 @@
expressed in spaces. Issue an error when the option is given twice.
.TP
.B \-u
-Force stdin, stdout and stderr to be totally unbuffered.
+Force stdin, stdout and stderr to be totally unbuffered. Note that
+there is internal buffering in xreadlines(), readlines() and file-object
+iterators ("for line in sys.stdin") which is not influenced by this
+option. To work around this, you will want to use "sys.stdin.readline()"
+inside a "while 1:" loop.
.TP
.B \-v
Print a message each time a module is initialized, showing the place