(marker_code): New arg surrounding.  Callers changed. (surrounding_pos): Check if name[0] == '@'. (integer_value): Fix for the change semantics of `@-N' and `@+N'.
(marker_code): New arg surrounding.  Callers changed.
(surrounding_pos): Check if name[0] == '@'.
(integer_value): Fix for the change semantics of `@-N' and `@+N'.

xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib