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-.\" Copyright (c) 1980, 1990, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)checknr.1	8.1 (Berkeley) 6/6/93
-.\" $FreeBSD$
-.\"
-.Dd May 5, 2015
-.Dt CHECKNR 1
-.Os
-.Sh NAME
-.Nm checknr
-.Nd check nroff/troff files
-.Sh SYNOPSIS
-.Nm
-.Op Fl a Ns Ar \&.x1.y1.x2.y2. ... \&.xn.yn
-.Op Fl c Ns Ar \&.x1.x2.x3 ... \&.xn
-.Op Fl s
-.Op Fl f
-.Ar file
-.Sh DESCRIPTION
-The
-.Nm
-utility checks a list of
-.Xr nroff 1
-or
-.Xr troff 1
-input files for certain kinds of errors
-involving mismatched opening and closing delimiters
-and unknown commands.
-If no files are specified,
-.Nm
-checks the standard input.
-.Pp
-The following options are available:
-.Bl -tag -width indent
-.It Fl a
-Add additional pairs of macros to the list of known macros.
-This must be followed by groups of six characters, each group defining
-a pair of macros.
-The six characters are
-a period,
-the first macro name,
-another period,
-and the second macro name.
-For example, to define a pair .BS and .ES, use
-.Sq Li \-a.BS.ES
-.It Fl c
-Define commands which would otherwise be complained about
-as undefined.
-.It Fl f
-Request
-.Nm
-to ignore
-.Ql \ef
-font changes.
-.It Fl s
-Ignore
-.Ql \es
-size changes.
-.El
-.Pp
-Delimiters checked are:
-.Bl -enum
-.It
-Font changes using \efx ...\& \efP.
-.It
-Size changes using \esx ...\& \es0.
-.It
-Macros that come in open ...\& close forms, for example,
-the .TS and .TE macros which must always come in pairs.
-.El
-.Pp
-The
-.Nm
-utility is intended for use on documents that are prepared with
-.Nm
-in mind, much the same as
-.Xr lint 1 .
-It expects a certain document writing style for
-.Ql \ef
-and
-.Ql \es
-commands,
-in that each
-.Ql \efx
-must be terminated with
-.Ql \efP
-and
-each
-.Ql \esx
-must be terminated with
-.Ql \es0 .
-While it will work to directly go into the next font or explicitly
-specify the original font or point size,
-and many existing documents actually do this,
-such a practice will produce complaints from
-.Nm .
-Since it is probably better to use the
-.Ql \efP
-and
-.Ql \es0
-forms anyway,
-you should think of this as a contribution to your document
-preparation style.
-.Pp
-The
-.Nm
-utility knows about the
-.Xr ms 7
-and
-.Xr me 7
-macro packages.
-.Sh DIAGNOSTICS
-.Bd -ragged -compact
-Complaints about unmatched delimiters.
-Complaints about unrecognized commands.
-Various complaints about the syntax of commands.
-.Ed
-.Sh SEE ALSO
-.Xr nroff 1 ,
-.Xr troff 1 ,
-.Xr me 7 ,
-.Xr ms 7
-.\" .Xr checkeq 1 ,
-.Sh HISTORY
-The
-.Nm
-command appeared in
-.Bx 4.0 .
-.Sh BUGS
-There is no way to define a 1 character macro name using
-.Fl a .
-.Pp
-Does not correctly recognize certain reasonable constructs,
-such as conditionals.