This turned up when I compared the output of groff(1) and mandoc(1) (http://mdocml.bsd.lv/).
--- doc/bash.1.orig Sat Aug 4 21:34:54 2012 +++ doc/bash.1 Sat Aug 4 21:35:13 2012 @@ -2271,7 +2271,7 @@ The value of \fIp\fP determines whether or not the fra included. .IP If this variable is not set, \fBbash\fP acts as if it had the -value \fB$\(aq\enreal\et%3lR\enuser\et%3lU\ensys\t%3lS\(aq\fP. +value \fB$\(aq\enreal\et%3lR\enuser\et%3lU\ensys\et%3lS\(aq\fP. If the value is null, no timing information is displayed. A trailing newline is added when the format string is displayed. .PD 0 -- Christian "naddy" Weisgerber na...@mips.inka.de