Document isblank usage

weblate/settings.py

@@ -15,8 +15,8 @@ MANAGERS = ADMINS
 
 DATABASES = {
     'default': {
-        'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2',  'mysql', 'sqlite3' or 'oracle'.
-        'NAME': 'weblate',                      # Or path to database file if using sqlite3.
+        'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2',  'mysql', 'sqlite3' or 'oracle'.
+        'NAME': 'weblate.db',                      # Or path to database file if using sqlite3.
         'USER': 'weblate',                      # Not used with sqlite3.
         'PASSWORD': 'weblate',                  # Not used with sqlite3.
         'HOST': '127.0.0.1',                      # Set to empty string for localhost. Not used with sqlite3.

weblate/trans/models.py

@@ -798,6 +798,9 @@ class Translation(models.Model):
         # Load po file
         store = self.get_store()
         for pos, unit in enumerate(store.units):
+            # We care only about translatable strings
+            # For some reason, blank string does not mean non translatable
+            # unit in some formats (XLIFF), so let's skip those as well
             if not unit.istranslatable() or unit.isblank():
                 continue
             newunit = Unit.objects.update_from_unit(self, unit, pos)