Fix typos of "function".

pkg/expect/lib/expect.dart

Index: pkg/expect/lib/expect.dart
diff --git a/pkg/expect/lib/expect.dart b/pkg/expect/lib/expect.dart
index 82e604a41a6b6b55714cdb927306a15f7b4940d5..e7eb89218c428a92156517b8609edc628cf813f2 100644
--- a/pkg/expect/lib/expect.dart
+++ b/pkg/expect/lib/expect.dart
@@ -363,7 +363,7 @@ class Expect {
     if (f is! _Nullary) {
       // Only throws from executing the funtion body should count as throwing.
       // The failure to even call `f` should throw outside the try/catch.
-      _fail("Expect.throws$msg: Funciton f not callable with zero arguments");
+      _fail("Expect.throws$msg: Function f not callable with zero arguments");
     }
     try {
       f();
@@ -406,12 +406,12 @@ class NoInline {
 /// Annotation class for testing of dart2js. Use this as metadata on method
 /// declarations to make the type inferrer trust the parameter and return types,
 /// effectively asserting the runtime values will (at least) be subtypes of the
-/// annotated types. 
+/// annotated types.
 ///
-/// While the actually inferred type is guaranteed to be a subtype of the 
-/// annotation, it often is more precise. In particular, if a method is only 
+/// While the actually inferred type is guaranteed to be a subtype of the
+/// annotation, it often is more precise. In particular, if a method is only
 /// called with `null`, the inferrer will still infer null. To ensure that
-/// the annotated type is also the inferred type, additionally use 
+/// the annotated type is also the inferred type, additionally use
 /// [AssumeDynamic].
 class TrustTypeAnnotations {
   const TrustTypeAnnotations();
@@ -420,7 +420,7 @@ class TrustTypeAnnotations {
 /// Annotation class for testing of dart2js. Use this as metadata on method
 /// declarations to disable closed world assumptions on parameters, effectively
 /// assuming that the runtime arguments could be any value. Note that the
-/// constraints due to [TrustTypeAnnotations] still apply. 
+/// constraints due to [TrustTypeAnnotations] still apply.
 class AssumeDynamic {
   const AssumeDynamic();
 }