===================================================================
RCS file: /cvs/mandoc/mandoc.1,v
retrieving revision 1.186
retrieving revision 1.196
diff -u -p -r1.186 -r1.196
--- mandoc/mandoc.1	2017/05/17 22:43:56	1.186
+++ mandoc/mandoc.1	2017/06/08 00:23:30	1.196
@@ -1,4 +1,4 @@
-.\"	$Id: mandoc.1,v 1.186 2017/05/17 22:43:56 schwarze Exp $
+.\"	$Id: mandoc.1,v 1.196 2017/06/08 00:23:30 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2012, 2014-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: May 17 2017 $
+.Dd $Mdocdate: June 8 2017 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -75,6 +75,11 @@ and for the
 .Xr man 7
 .Ic \&TH
 macro.
+This can also be used to perform style checks according to the
+conventions of one operating system while running on a different
+operating system; see
+.Sx Style messages
+for details.
 .It Fl K Ar encoding
 Specify the input encoding.
 The supported
@@ -219,7 +224,7 @@ See
 .It Fl T Cm lint
 Parse only: produce no output.
 Implies
-.Fl W Cm warning .
+.Fl W Cm style .
 .It Fl T Cm locale
 Encode output using the current locale.
 This is the default.
@@ -253,9 +258,6 @@ See
 Encode output in the UTF\-8 multi-byte format.
 See
 .Sx UTF\-8 Output .
-.It Fl T Cm xhtml
-This is a synonym for
-.Fl T Cm html .
 .El
 .Pp
 If multiple input files are specified, these will be processed by the
@@ -635,12 +637,11 @@ to exit at once, possibly in the middle of parsing or 
 Note that selecting
 .Fl T Cm lint
 output mode implies
-.Fl W Cm warning .
+.Fl W Cm style .
 .Sh EXAMPLES
 To page manuals to the terminal:
 .Pp
-.Dl $ mandoc \-W all,stop mandoc.1 2\*(Gt&1 | less
-.Dl $ mandoc mandoc.1 mdoc.3 mdoc.7 | less
+.Dl $ mandoc -l mandoc.1 man.1 apropos.1 makewhatis.8
 .Pp
 To produce HTML manuals with
 .Pa mandoc.css
@@ -746,6 +747,58 @@ are hidden unless their level, or a lower level, is re
 option or
 .Fl T Cm lint
 output mode.
+.Ss Style messages
+As indicated below, some style checks are only performed if a
+specific operating system name occurs in the arguments of the
+.Ic \&Os
+macro, of the
+.Fl Ios
+command line option, or, if neither are present, in the return value
+of the
+.Xr uname 3
+function.
+.Bl -ohang
+.It Sy "useless macro"
+.Pq mdoc
+A
+.Ic \&Bt ,
+.Ic \&Tn ,
+or
+.Ic \&Ud
+macro was found.
+Simply delete it: it serves no useful purpose.
+.It Sy "consider using OS macro"
+.Pq mdoc
+A string was found in plain text or in a
+.Ic \&Bx
+macro that could be represented using
+.Ic \&Ox ,
+.Ic \&Nx ,
+.Ic \&Fx ,
+or
+.Ic \&Dx .
+.It Sy "errnos out of order"
+.Pq mdoc, Nx
+The
+.Ic \&Er
+items in a
+.Ic \&Bl
+list are not in alphabetical order.
+.It Sy "duplicate errno"
+.Pq mdoc, Nx
+A
+.Ic \&Bl
+list contains two consecutive
+.Ic \&It
+entries describing the same
+.Ic \&Er
+number.
+.It Sy "description line ends with a full stop"
+.Pq mdoc
+Do not use punctuation at the end of an
+.Ic \&Nd
+block.
+.El
 .Ss Warnings related to the document prologue
 .Bl -ohang
 .It Sy "missing manual title, using UNTITLED"
@@ -1346,6 +1399,12 @@ or
 .Ic \&Fn
 macro contains an opening or closing parenthesis; that's probably wrong,
 parentheses are added automatically.
+.It Sy "unknown library name"
+.Pq mdoc, not on Ox
+An
+.Ic \&Lb
+macro has an unknown name argument and will be rendered as
+.Qq library Dq Ar name .
 .It Sy "invalid content in Rs block"
 .Pq mdoc
 An
@@ -1693,6 +1752,11 @@ whatever mode was active before the block.
 A
 .Ic \&Bl
 macro fails to specify the list type.
+.It Sy "argument is not numeric, using 1"
+.Pq roff
+The argument of a
+.Ic \&ce
+request is not a number.
 .It Sy "missing manual name, using \(dq\(dq"
 .Pq mdoc
 The first call to