modify description in comments

gen_pathnames.sh

 #!/bin/bash
-# loop on list of option dirs and generate corresponding pathnames
+# loop on list of option dirs 
+# extract suffixes 
+# generate corresponding pathnames from working template
+# make corresponding output dirs locally
+
 # snippet from 
 # /Users/ignacio/todo/doing/flexpart/2018-05-25/loop_on_ls.sh
 # /Users/ignacio/todo/doing/flexpart/2018-05-24/loop_on_ls.sh