Spelling (firebase#411)

* spelling: aggregate

* spelling: android

* spelling: appveyor

* spelling: constructs

* spelling: error

* spelling: invocable

* spelling: limitations

* spelling: maximum

* spelling: programmatically

* spelling: suppress

* spelling: wifi

* spelling: windows

CONTRIBUTING.md

@@ -75,7 +75,7 @@ To send us a pull request:
 Please make sure all your checkins have detailed commit messages explaining the patch.
 
 Once you've gotten an LGTM from a project maintainer and once your PR has received
-the green light from all our automated testing (Travis, Appveyor, etc), submit your
+the green light from all our automated testing (Travis, AppVeyor, etc), submit your
 changes to the `master` branch using one of the following methods:
 
 * Wait for one of the project maintainers to submit it for you.

packages/cloud_firestore/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java

@@ -260,7 +260,7 @@ public void success(Object doTransactionResult) {
                             @Override
                             public void error(
                                 String errorCode, String errorMessage, Object errorDetails) {
-                              // result.error(errorCode, errorMessage, errroDetails);
+                              // result.error(errorCode, errorMessage, errorDetails);
                               transactionTCS.setException(new Exception("Do transaction failed."));
                             }
 

packages/firebase_admob/README.md

@@ -52,7 +52,7 @@ myBanner
 
 `BannerAd` and `InterstitialAd` objects can be disposed to free up plugin
 resources. Disposing a banner ad that's been shown removes it from the screen.
-Interstitial ads, however, can't be programatically removed from view.
+Interstitial ads, however, can't be programmatically removed from view.
 
 Banner and interstitial ads can be created with a `MobileAdEvent` listener. The
 listener can be used to detect when the ad has actually finished loading
@@ -98,7 +98,7 @@ method.
 ## Limitations
 
 This is just an initial version of the plugin. There are still some
-limitiations:
+limitations:
 
 - Banner ads have limited positioning functionality. They can be positioned at the top or the bottom of the screen and at a logical pixel offset from the edge.
 - Banner ads cannot be animated into view.

packages/firebase_analytics/lib/observer.dart

@@ -10,7 +10,7 @@ import 'firebase_analytics.dart';
 /// Signature for a function that extracts a screen name from [RouteSettings].
 ///
 /// Usually, the route name is not a plain string, and it may contains some
-/// unique ids that makes it difficult to agregate over them in Firebase
+/// unique ids that makes it difficult to aggregate over them in Firebase
 /// Analytics.
 typedef String ScreenNameExtractor(RouteSettings settings);