cmd/tests: Test handling of strings starting with on/off using the ECHO builtin.

programs/cmd/tests/test_builtins.cmd

diff --git a/programs/cmd/tests/test_builtins.cmd b/programs/cmd/tests/test_builtins.cmd
index 6cd8a48..1c53cd2 100644
--- a/programs/cmd/tests/test_builtins.cmd
+++ b/programs/cmd/tests/test_builtins.cmd
@@ -15,6 +15,7 @@
 echo :
 echo:word
 echo :word
+echo off now
 echo word@space@
 echo word@space@@space@
  echo word
@@ -41,6 +42,7 @@
 echo :
 echo:word
 echo :word
+echo on again
 echo word@space@
 echo word@space@@space@
  echo word

programs/cmd/tests/test_builtins.cmd.exp

diff --git a/programs/cmd/tests/test_builtins.cmd.exp b/programs/cmd/tests/test_builtins.cmd.exp
index e6bf421..c9c6521 100644
--- a/programs/cmd/tests/test_builtins.cmd.exp
+++ b/programs/cmd/tests/test_builtins.cmd.exp
@@ -42,6 +42,9 @@
 @pwd@>echo :word@space@
 :word
 
+@pwd@>echo off now@space@
+off now
+
 @pwd@>echo word@space@@space@
 word@space@
 
@@ -85,6 +88,7 @@
 :
 word
 :word
+on again
 word@space@
 word@space@@space@
 word