\unprotect

% for tugboat

\definebtxcommand\hbox   {\hbox}
\definebtxcommand\vbox   {\vbox}
\definebtxcommand\llap   {\llap}
\definebtxcommand\rlap   {\rlap}
\definebtxcommand\url  #1{\hyphenatedurl{#1}}
\definebtxcommand\acro #1{\dontleavehmode{\smallcaps#1}}

\let\<<
\let\<>

\protect \endinput