Fix common spelling mistakes (#4956)

* add codespell

* first fixes

* doc fixes

* fix docstrings and comments

* functional changes

* docstrings again

* and docs again

* rename args

* add ignore

* use pre-commit for filtering instead

* ups

* fix typo in filter

InvenTree/users/admin.py

@@ -98,7 +98,7 @@ class RoleGroupAdmin(admin.ModelAdmin):  # pragma: no cover
                 break
 
         def append_permission_level(permission_level, next_level):
-            """Appen permission level"""
+            """Append permission level"""
             if not permission_level:
                 return next_level
 

InvenTree/users/models.py

@@ -303,7 +303,7 @@ class RuleSet(models.Model):
             return self.name
 
     def save(self, *args, **kwargs):
-        """Intercept the 'save' functionality to make addtional permission changes:
+        """Intercept the 'save' functionality to make additional permission changes:
 
         It does not make sense to be able to change / create something,
         but not be able to view it!
@@ -355,7 +355,7 @@ def update_group_roles(group, debug=False):
     This function is called under the following conditions:
 
     a) Whenever the InvenTree database is launched
-    b) Whenver the group object is updated
+    b) Whenever the group object is updated
 
     The RuleSet model has complete control over the permissions applied to any group.
     """