Merge branch 'fix-spelling-mistake-an-lesson' into 'master'

Fix spelling mistake

See merge request !292

aleksis/apps/chronos/preferences.py

@@ -17,7 +17,7 @@ class UseParentGroups(BooleanPreference):
     default = False
     verbose_name = _("Use parent groups in timetable views")
     help_text = _(
-        "If an lesson or substitution has only one group"
+        "If a lesson or substitution has only one group"
         " and this group has parent groups,"
         " show the parent groups instead of the original group."
     )
@@ -39,7 +39,7 @@ class ShortenGroupsLimit(IntegerPreference):
     default = 4
     verbose_name = _("Limit of groups for shortening of groups")
     help_text = _(
-        "If an user activates shortening of groups,"
+        "If a user activates shortening of groups,"
         "they will be collapsed if there are more groups than this limit."
     )