Update formatters for the Xcode 10.3 Travis image (#3739)

Author: paulb777

Example/Database/Tests/Integration/FOrderByTests.m

@@ -235,7 +235,9 @@ - (void)testFiresChildMovedEvents {
         moved = YES;
         XCTAssertEqualObjects(snapshot.key, @"greg", @"");
         XCTAssertEqualObjects(prevName, @"rob", @"");
-        XCTAssertEqualObjects(snapshot.value, @{@"nuggets" : @57}, @"");
+        XCTAssertEqualObjects(
+            snapshot.value,
+            @{@"nuggets" : @57}, @"");
       }];
 
   [ref setValue:initial];

FirebaseInstallations/Source/Tests/Unit/FIRInstallationsAPIServiceTests.m

@@ -436,9 +436,9 @@ - (id)refreshTokenRequestValidationArgWithInstallation:(FIRInstallationsItem *)i
                                                            error:&error];
     XCTAssertNotNil(body, @"Error: %@, test: %@", error, self.name);
 
-    XCTAssertEqualObjects(body,
-                          @{@"installation" : @{@"sdkVersion" : [self SDKVersion]}}, @"%@",
-                          self.name);
+    XCTAssertEqualObjects(
+        body,
+        @{@"installation" : @{@"sdkVersion" : [self SDKVersion]}}, @"%@", self.name);
 
     return YES;
   }];

FirebaseRemoteConfig/Sources/RCNConfigDBManager.m

@@ -762,10 +762,11 @@ - (void)loadExperimentWithCompletionHandler:(RCNDBCompletion)handler {
 
     if (handler) {
       dispatch_async(dispatch_get_main_queue(), ^{
-        handler(YES, @{
-          @RCNExperimentTableKeyPayload : [experimentPayloads copy],
-          @RCNExperimentTableKeyMetadata : [experimentMetadata copy]
-        });
+        handler(
+            YES, @{
+              @RCNExperimentTableKeyPayload : [experimentPayloads copy],
+              @RCNExperimentTableKeyMetadata : [experimentMetadata copy]
+            });
       });
     }
   });

Firestore/Swift/Tests/Integration/CodableIntegrationTests.swift

@@ -67,7 +67,8 @@ class CodableIntegrationTests: FSTIntegrationTestCase {
         return nil
       }) { object, error in
         completion?(error)
-    } }
+      }
+    }
 
     awaitExpectations()
   }
@@ -147,7 +148,7 @@ class CodableIntegrationTests: FSTIntegrationTestCase {
     struct Model: Encodable {
       var name: String
       var explicitNull: ExplicitNull<String>
-      var optional: Optional<String>
+      var optional: String?
     }
     let model = Model(
       name: "name",

README.md

@@ -98,13 +98,17 @@ Travis will verify that any code changes are done in a style compliant way. Inst
 These commands will get the right versions:
 
 ```
-brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/773cb75d360b58f32048f5964038d09825a507c8/Formula/clang-format.rb
-brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/3dfea1004e0736754bbf49673cca8aaed8a94089/Formula/swiftformat.rb
+brew upgrade https://raw.githubusercontent.com/Homebrew/homebrew-core/e3496d9/Formula/clang-format.rb
+brew upgrade https://raw.githubusercontent.com/Homebrew/homebrew-core/7963c3d/Formula/swiftformat.rb
 ```
 
 Note: if you already have a newer version of these installed you may need to
 `brew switch` to this version.
 
+To update this section, find the versions of clang-format and swiftformat.rb to
+match the versions in the CI failure logs
+[here](https://github.com/Homebrew/homebrew-core/tree/master/Formula).
+
 ### Running Unit Tests
 
 Select a scheme and press Command-u to build a component and run its unit tests.