.\" test the .do request by using it to define a string with a long
.\" name, and then echoing it.
.\"
.cp 1	\" turn compatibility mode on
.\"
.\" next commands should print that abcd has value "abcd]"
.\"
.tm First, with compatibility mode on:
.ds abcd this is a string
.tm string named abcd has value = "\*[abcd]"
.\"
.\" next commands should print that abcd has value "this is a string"
.\"
.tm Second, using .do to temporarily disable compatibility mode
.do ds abcd this is a string
.do tm string named abcd has value = "\*[abcd]"
