Merge pull request 'transmit multiple occurence of an argument into a list' (#130) from jmplace/ScoDoc-Lille:fix_multivalued_args into master

Reviewed-on: https://scodoc.org/git/viennet/ScoDoc/pulls/130

app/decorators.py

@@ -74,7 +74,8 @@ class ZRequest(object):
                 if k.endswith(":list"):
                     self.form[k[:-5]] = request.args.getlist(k)
                 else:
-                    self.form[k] = request.args[k]
+                    values = request.args.getlist(k)
+                    self.form[k] = values[0] if len(values) == 1 else values
             # current_app.logger.info("ZRequest.form=%s" % str(self.form))
         self.RESPONSE = ZResponse()