relnotes: copy "next" to "5.6" and clear "next"
The same procedure as every year^Wcycle.
Differential Revision: https://phab.mercurial-scm.org/D9263
from __future__ import absolute_import, print_functionimport sysfor line in sys.stdin: if line.lower() in ("message-id: \n", "in-reply-to: \n"): line = line[:-2] print(line, end="")