For some reason, if this line is enabled while the command "erl -man erl"
is run, then MANPATH is set to $TERMUX_PREFIX/lib/erlang/man/
and erl searches a whole bunch of paths under that path for man pages,
but somehow none of the paths it searches are the actual correct path,
$TERMUX_PREFIX/lib/erlang/man/cat1/erl.1.
If this line is deleted, then the command "erl -man erl" works.

--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -759,7 +759,6 @@ int main(int argc, char **argv)
                             }
                         }
 			erts_snprintf(tmpStr, sizeof(tmpStr), "%s/man", rootdir);
-			set_env("MANPATH", tmpStr);
 			execvp("man", argv+i);
 			error("Could not execute the 'man' command.");
 #endif