style-guide: Simplify the structure of a recommendation (no semantic change)

Avoid putting a sentence fragment after a list; integrate it with the
sentence before the list.

src/doc/style-guide/src/items.md

@@ -491,14 +491,12 @@ example, `a::*` comes before `b::a` but `a::b` comes before `a::*`. E.g.,
 
 #### Normalisation
 
-Tools must make the following normalisations:
+Tools must make the following normalisations, recursively:
 
 * `use a::self;` -> `use a;`
 * `use a::{};` -> (nothing)
 * `use a::{b};` -> `use a::b;`
 
-And must apply these recursively.
-
 Tools must not otherwise merge or un-merge import lists or adjust glob imports
 (without an explicit option).