While there is nothing wrong with "while true", "while :" is better
and used a lot more often in the source tree.

OK?

Index: bin/sleep/sleep.1
===================================================================
RCS file: /cvs/src/bin/sleep/sleep.1,v
retrieving revision 1.22
diff -u -p -r1.22 sleep.1
--- bin/sleep/sleep.1   16 Aug 2016 18:51:25 -0000      1.22
+++ bin/sleep/sleep.1   20 Dec 2016 21:46:07 -0000
@@ -94,7 +94,7 @@ job.
 .Pp
 To monitor the growth of a file without consuming too many resources:
 .Bd -literal -offset indent
-while true; do
+while :; do
        ls -l file
        sleep 5
 done

-- 
Michal Mazurek

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