Spell check of Flutter docs (#45200)

No code changes, just comments: I spell-checked all the comments in the repo.
diff --git a/packages/flutter_tools/lib/src/web/compile.dart b/packages/flutter_tools/lib/src/web/compile.dart
index 4f40ccc..3995fa8 100644
--- a/packages/flutter_tools/lib/src/web/compile.dart
+++ b/packages/flutter_tools/lib/src/web/compile.dart
@@ -81,7 +81,7 @@
   /// Returns whether or not the build was successful.
   ///
   /// `release` controls whether we build the bundle for dartdevc or only
-  /// the entrypoints for dart2js to later take over.
+  /// the entry points for dart2js to later take over.
   Future<bool> initialize({
     @required Directory projectDirectory,
     @required String projectName,