docs: updated usage section

CHANGELOG

 <a name="0.0.18"></a>
-## <small>0.0.18 (2018-04-23)</small>
+## <small>0.0.18 (2018-04-24)</small>
 
 * docs: Added bpt1 setup in examples ([a76abff](https://gitlab.pasteur.fr/bis-aria/Ariaec/commit/a76abff))
 * docs: Added link to example archive in docs ([9ec966b](https://gitlab.pasteur.fr/bis-aria/Ariaec/commit/9ec966b))
+* docs: Added MALE_ECOLI example data ([4877131](https://gitlab.pasteur.fr/bis-aria/Ariaec/commit/4877131))
 * docs: updated changelog ([ceececc](https://gitlab.pasteur.fr/bis-aria/Ariaec/commit/ceececc))
 * docs: updated changelog ([95d3f62](https://gitlab.pasteur.fr/bis-aria/Ariaec/commit/95d3f62))
 * docs: Updated changelog (removed old tags) ([a59416d](https://gitlab.pasteur.fr/bis-aria/Ariaec/commit/a59416d))

aria/conbox/commands.py

@@ -260,8 +260,7 @@ class AriaEcCommands(object):
         parser.add_argument("seq", help="sequence file [FASTA]",
                             action=ReadableFile)
         parser.add_argument("msa", nargs='?',
-                            help="MSA [FASTA] for diversityvalue"
-                                 "used with bbcontacts")
+                            help="MSA [FASTA] used to compute diversityvalue ")
         parser.add_argument("-t", "--type", required=True, dest="contact_type",
                             choices=self.contact_types, help="Infile contact "
                                                              "type")