The .nf macro stops formatting of the text in the man page, and the
macro .fi should be used to end.  This wasn't done before, which is
noticable for where the text is wrapped when opening the man page with a
larger/smaller terminal width.

The virtual memory mapping info retrieved by the command "info maps" has
the end address in the second column, even though the title for the
column says "Size".

The lexer was matching tALL before checking for tIDENTIFIER, and the set
command didn't have any rules for tALL, which prevented setting the
flags for all the debug channels.