-.\" $Id: roff.7,v 1.74 2015/08/29 22:40:05 schwarze Exp $
+.\" $Id: roff.7,v 1.75 2015/09/24 18:41:22 schwarze Exp $
.\"
.\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
.\" Copyright (c) 2010, 2011, 2013-2015 Ingo Schwarze <schwarze@openbsd.org>
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: August 29 2015 $
+.Dd $Mdocdate: September 24 2015 $
.Dt ROFF 7
.Os
.Sh NAME
.It
If the first character of COND is
.Sq r ,
-it evalutes to true if the rest of COND is the name of an existing
+it evaluates to true if the rest of COND is the name of an existing
number register; otherwise, it evaluates to false.
.It
If COND starts with a parenthesis or with an optionally signed
Temporarily turn off line numbering.
Currently unsupported.
.Ss \&nop
-Exexute the rest of the input line as a request or macro line.
+Execute the rest of the input line as a request or macro line.
Currently unsupported.
.Ss \&nr
Define or change a register.
Takes an arbitrary number of arguments.
Currently unsupported.
.Ss \&tc
-Change tab repetion character.
+Change tab repetition character.
Currently unsupported.
.Ss \&TE
End a table context.
This is a Heirloom extension and currently ignored.
.Ss \&watchlength
On change, report the contents of macros and strings
-up to the sepcified length.
+up to the specified length.
This is a Heirloom extension and currently ignored.
.Ss \&watchn
Notify on change of register.
maximum (not available in C)
.El
.Pp
-There is no concept of precendence; evaluation proceeds from left to right,
+There is no concept of precedence; evaluation proceeds from left to right,
except when subexpressions are enclosed in parantheses.
Inside parentheses, whitespace is ignored.
.Sh ESCAPE SEQUENCE REFERENCE