issue #2243 -- prefer f-strings over %-interpolation

edited docs to prefer f-strings, then str.format(), and remove %-interpolation

additional ad-hoc documentation fixes, as opportunities seen:
- replace Built-In Function (BIF) "min" variable with "mins"
- prefer BIF str(var) over "%s" % var
- reformat some code examples to clarify multiple args passed to functions
- change some single-quote strings to double-quotes for consistency
- fix mismatched parens

misc edits:
- add .vscode/ to gitignore

docs/source/Components/Locks.md

@@ -190,7 +190,7 @@ The above could for example be used in a lock function like this:
 
 ```python
     # we have `obj` and `owner_object` from before
-    obj.locks.add("edit: id(%i)" % owner_object.id)
+    obj.locks.add(f"edit: id({owner_object.id})")
 ```
 
 We could check if the "edit" lock is passed with something like this: