🚀 go-pugleaf

While trying to generate the GNU Emacs manual, I got the following
error message (see end of message).

The lines in emacs.kys that caused the problem looks like:
\entry {C-M-{\sf @}}{49, 140}
\entry {C-M-a}{141}

Any ideas on how to fix the problem will be greatly appreciated.
Thanks in advance.

Willie
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
[266] [267] [268] (Key (Character) Index) [269] [270] (emacs.kys [271]
Runaway argument?
{C-M-{\sf \}}{49, 140} 
! Forbidden control sequence found while scanning use of \entry.
<inserted text> 
                \par 
<to be read again> 
                   \entry 
l.106 \entry
             {C-M-a}{141}
?





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