Add more awk test cases

examples/awk/2.msh

@@ -1 +1 @@
-.. :10: wl
+.. :9: wl

examples/awk/3.awk

@@ -0,0 +1 @@
+{ print $NF }

examples/awk/3.msh

@@ -0,0 +1 @@
+wt (:-1: wl) each

examples/awk/test.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+emp_test() {
+    if diff <(awk -f "$1".awk emp.data) <(mshell "$1".msh < emp.data); then
+        printf "%s. pass\n" "$1"
+    else
+        printf "%s. fail\n" "$1"
+        FAIL=1
+    fi
+}
+
+FAIL=0
+
+emp_test 1
+
+if diff <(seq 1 20 | awk -f '2.awk' ) <(seq 1 20 | mshell 2.msh); then
+    printf "2. pass\n"
+else
+    printf "2. fail\n"
+    FAIL=1
+fi
+
+emp_test 3
+
+exit "$FAIL"