Review feedback

Swift api
limbo error message

Author: rsgowman

Firestore/Example/SwiftBuildTest/main.swift

@@ -228,11 +228,11 @@ func readDocument(at docRef: DocumentReference) {
 func readDocumentWithOptions(at docRef: DocumentReference) {
   docRef.getDocument(options:GetOptions.defaultOptions()) { document, error in
   }
-  docRef.getDocument(options:GetOptions.init(source:GetSource.default)) { document, error in
+  docRef.getDocument(options:GetOptions(source:GetSource.default)) { document, error in
   }
-  docRef.getDocument(options:GetOptions.init(source:GetSource.server)) { document, error in
+  docRef.getDocument(options:GetOptions(source:.server)) { document, error in
   }
-  docRef.getDocument(options:GetOptions.init(source:GetSource.cache)) { document, error in
+  docRef.getDocument(options:GetOptions(source:GetSource.cache)) { document, error in
   }
 }
 

Firestore/Source/Core/FSTFirestoreClient.m

@@ -298,7 +298,7 @@ - (void)getDocumentsFromLocalCache:(FIRQuery *)query
     FSTViewDocumentChanges *viewDocChanges = [view computeChangesWithDocuments:docs];
     FSTViewChange *viewChange = [view applyChangesToDocuments:viewDocChanges];
     FSTAssert(viewChange.limboChanges.count == 0,
-              @"View returned limbo docs before target ack from the server.");
+              @"View returned limbo documents during local-only query execution.");
 
     FSTViewSnapshot *snapshot = viewChange.snapshot;
     FIRSnapshotMetadata *metadata =