fix zimscraperlib version requirement; minor rewrite

Author: IMayBeABitShy

requirements.txt

@@ -1,6 +1,6 @@
 kiwixstorage>=0.8.1,<1.0
 pif>=0.8.2,<0.9
-zimscraperlib>=3.2.0,<4.0
+zimscraperlib>=3.3.0,<4.0
 xml_to_dict>=0.1.6,<0.2
 cli-formatter>=1.2.0,<1.3
 py7zr>=0.20.4,<0.21

src/sotoki/scraper.py

@@ -78,14 +78,11 @@ def sanitize_inputs(self):
         self.conf.title = self.conf.title.strip()
 
         default_description = Global.site["Tagline"].strip()
-        if self.conf.description is not None:
+        if self.conf.description:
             user_description = self.conf.description.strip()
         else:
             user_description = None
-        user_long_description = self.conf.long_description
-        description, long_description = compute_descriptions(default_description, user_description, user_long_description)
-        self.conf.description = description
-        self.conf.long_description = long_description
+        self.conf.description, self.conf.long_description = compute_descriptions(default_description, user_description, self.conf.long_description)
 
         if not self.conf.author:
             self.conf.author = "Stack Exchange"