[BUGFIX] Last metadata of RIS and ISI files are now appended to the corpus

https://forge.iscpif.fr/issues/1368

parsing/FileParsers/RisFileParser.py

@@ -20,29 +20,31 @@ class RisFileParser(FileParser):
         metadata = {}
         last_key = None
         last_values = []
+        # browse every line of the file
         for line in file:
             if len(line) > 2:
+                # extract the parameter key
                 parameter_key = line[:2]
                 if parameter_key != b'  ' and parameter_key != last_key:
                     if last_key in self._parameters:
+                        # translate the parameter key
                         parameter = self._parameters[last_key]
                         if parameter["type"] == "metadata":
                             separator = parameter["separator"] if "separator" in parameter else ""
                             metadata[parameter["key"]] = separator.join(last_values)
                         elif parameter["type"] == "delimiter":
-                            try:
                             if 'language_fullname' not in metadata.keys():
                                 if 'language_iso3' not in metadata.keys():
                                     if 'language_iso2' not in metadata.keys():
                                         metadata['language_iso2'] = 'en'
                             yield metadata
                             metadata = {}
-                            except:
-                                pass
                     last_key = parameter_key
                     last_values = []
                 try:
                     last_values.append(line[3:-1].decode())
                 except Exception as error:
                     print(error)
-                    pass
+        # if a metadata object is left in memory, yield it as well
+        if metadata:
+            yield metadata