Don't require whitespace.

Consume whitespace if there is any, but still match if there isn't. This makes most sense for \n followed immediately by ¿. This also means we don't have to backtrack if there isn't any whitespace after a line ending.

dateparser/languages/locale.py

@@ -263,7 +263,7 @@ def _sentence_split(self, string, settings):
 
         splitters_dict = {1: r'[\.!?;…\r\n]+(?:\s|$)*',  # most European, Tagalog, Hebrew, Georgian,
                           # Indonesian, Vietnamese
-                          2: r'[\.!?;…\r\n]+(\s+[¡¿]*|$)|[¡¿]+',  # Spanish
+                          2: r'[\.!?;…\r\n]+(\s*[¡¿]*|$)|[¡¿]+',  # Spanish
                           3: r'[|!?;\r\n]+(?:\s|$)+',  # Hindi and Bangla
                           4: r'[。…‥\.!?？！;\r\n]+(?:\s|$)+',  # Japanese and Chinese
                           5: r'[\r\n]+',  # Thai