builtin(1): Add missing escaping for !, . and : in the table.
builtin(1): Add missing escaping for !, . and : in the table.

This caused these commands to look differently (not bold) from the other
commands in the table (bold).

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase