Remove redundant stuff

utils/clean.py

@@ -23,16 +23,18 @@ del normalize_chars
 r_space_cleaner = re.compile(r'\s+')
 r_space_normalizer = re.compile(r'[\U00003000\U0000205F\U0000202F\U0000200A\U00002000-\U00002009\U00001680\U000000A0\t]+| {2,}')
 r_newline_cleaner = re.compile(r'\n+')
-r_single_apostrophe_normalizer = re.compile(r'[’`]')
+r_single_apostrophe_normalizer = re.compile(r'[’]')
 r_double_apostrophe_normalizer = re.compile(r'[“”]')
 r_strange_apostrophe_normalizer = re.compile(r'[『』]')
+r_url_cleaner = re.compile(r'^https?:\/\/.*[\r\n]*')
 
 def clean(text):
     text = text.translate(normal_map)
     text = r_space_cleaner.sub(' ', text)
-    text = r_space_normalizer.sub(' ', text)
+    #text = r_space_normalizer.sub(' ', text)
     text = r_newline_cleaner.sub(' ', text)
     text = r_single_apostrophe_normalizer.sub('\'', text)
     text = r_double_apostrophe_normalizer.sub('\"', text)
     text = r_strange_apostrophe_normalizer.sub('\"', text)
+    text = r_url_cleaner.sub('[File URL attached]', text)
     return text