src/dialign.c | 12 8 + 4 - 0 !
1 file changed, 8 insertions(+), 4 deletions(-)

 gives a default value to par_file so that the environment variable 
             DIALIGN2_DIR is optional

src/dialign.c | 2 1 + 1 - 0 !
1 file changed, 1 insertion(+), 1 deletion(-)

 mentions the man page and /usr/share/doc/dialign when it is invoked 
             without arguments