Fix "seq 1 1".
diff --git a/testsuite/seq.tests b/testsuite/seq.tests
index fd6f33a..73b1ad2 100755
--- a/testsuite/seq.tests
+++ b/testsuite/seq.tests
@@ -21,6 +21,7 @@
testing "seq one argument" "seq 3" "1\n2\n3\n" "" ""
testing "seq two arguments" "seq 5 7" "5\n6\n7\n" "" ""
testing "seq two arguments reversed" "seq 7 5" "" "" ""
+testing "seq two arguments equal" "seq 3 3" "3\n" "" ""
testing "seq count up by 2" "seq 4 2 8" "4\n6\n8\n" "" ""
testing "seq count down by 2" "seq 8 -2 4" "8\n6\n4\n" "" ""
testing "seq count wrong way #1" "seq 4 -2 8" "" "" ""