Add a test for jot(1).

tools/regression/usr.bin/Makefile

@@ -1,5 +1,5 @@
 # $FreeBSD$
 
-SUBDIR=	file2c join uudecode uuencode xargs
+SUBDIR=	file2c join jot uudecode uuencode xargs
 
 .include <bsd.subdir.mk>

tools/regression/usr.bin/jot/Makefile

@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+all:
+	@sh ${.CURDIR}/regress.sh ${.CURDIR}

tools/regression/usr.bin/jot/regress.out

@@ -0,0 +1 @@
+1,3,5,7,9,B,D,F,11,13,15,17,19,1B,1D,1F,21,23,25,27,29,2B,2D,2F,31,33,35,37,39,3B,3D,3F,41,43,45,47,49,4B,4D,4F,51,53,55,57,59,5B,5D,5F,61,63,65,67,69,6B,6D,6F,71,73,75,77,79,7B,7D,7F,81,83,85,87,89,8B,8D,8F,91,93,95,97,99,9B,9D,9F,A1,A3,A5,A7,A9,AB,AD,AF,B1,B3,B5,B7,B9,BB,BD,BF,C1,C3,C5,C8

tools/regression/usr.bin/jot/regress.sh

@@ -0,0 +1,16 @@
+# $FreeBSD$
+
+# Go into the regression test directory, handed to us by make(1)
+TESTDIR=$1
+if [ -z "$TESTDIR" ]; then
+  TESTDIR=.
+fi
+cd $TESTDIR
+
+jot -w '%X' -s ',' 100 1 200 | diff -u regress.out -
+if [ $? -eq 0 ]; then
+  echo "Test detected no regression, output matches."
+else
+  echo "Test failed: regression detected.  See above."
+  exit 1
+fi