D23354.diff
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	Index: head/lib/libc/sys/truncate.2
	===================================================================
	--- head/lib/libc/sys/truncate.2
	+++ head/lib/libc/sys/truncate.2
	@@ -28,7 +28,7 @@
	.\" @(#)truncate.2 8.1 (Berkeley) 6/4/93
	.\" $FreeBSD$
	.\"
	-.Dd May 4, 2015
	+.Dd January 24, 2020
	.Dt TRUNCATE 2
	.Os
	.Sh NAME
	@@ -160,6 +160,9 @@
	These calls should be generalized to allow ranges
	of bytes in a file to be discarded.
	.Pp
	-Use of
	+Historically, the use of
	.Fn truncate
	-to extend a file is not portable.
	+or
	+.Fn ftruncate
	+to extend a file was not portable, but this behavior became required in
	+.St -p1003.1-2008 .