Regen all remaining APIs with preproc - more changes than anticipated

gen/firebasehosting1_beta1/src/lib.rs

@@ -657,9 +657,11 @@ impl Part for ActingUser {}
 /// empty messages in your APIs. A typical example is to use it as the request
 /// or the response type of an API method. For instance:
 /// 
-///     service Foo {
-///       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
-///     }
+/// ````text
+/// service Foo {
+///   rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
+/// }
+/// ````
 /// 
 /// The JSON representation for `Empty` is empty JSON object `{}`.
 /// 
@@ -670,7 +672,6 @@ impl Part for ActingUser {}
 /// 
 /// * [domains delete sites](struct.SiteDomainDeleteCall.html) (response)
 /// * [versions delete sites](struct.SiteVersionDeleteCall.html) (response)
-/// 
 #[derive(Default, Clone, Debug, Serialize, Deserialize)]
 pub struct Empty { _never_set: Option<bool> }