Revert "fieldless" back to "C-like"

src/items/enumerations.md

@@ -78,13 +78,13 @@ In two circumstances, the discriminant of a variant may be explicitly set by
 following the variant name with `=` and a [constant expression]:
 
 
-1. if the enumeration is fieldless; e.g.:
+1. if the enumeration is "C-like" (i.e., it has no tuple or struct variants); e.g.:
 
    ```rust
    enum Enum {
        Foo = 3,
-       Bar() = 2,
-       Baz {} = 1,
+       Bar = 2,
+       Baz = 1,
    }
    ```
 
@@ -161,7 +161,7 @@ enum OverflowingDiscriminantError2 {
 
 [`mem::discriminant`] returns an opaque reference to the discriminant of
 an enum value which can be compared. This cannot be used to get the value
-of the discriminant. 
+of the discriminant.
 
 #### Casting