Spelling fixes e to i.

pkg/typed_mock/lib/typed_mock.dart

 library typed_mock;
 
 _InvocationMatcher _lastMatcher;
 
 /// Enables stubbing methods.
 ///
 /// Use it when you want the mock to return a particular value when a particular
 /// method, getter or setter is called.
 ///
 ///     when(obj.testProperty).thenReturn(10);
@@ skipping 222 matching lines @@
   void any() {
     // mark as verified, but don't check the actual count
     _count();
   }
 
   /// Verifies that there was no matching interactions.
   void never() {
     times(0);
   }
 
-  /// Verifies that there was excatly one martching interaction.
+  /// Verifies that there was exactly one matching interaction.
   void once() {
     times(1);
   }
 
   /// Verifies that there was the specified number of matching interactions.
   void times(int expected) {
     var times = _count();
     if (times != expected) {
       var member = _matcher._member;
       throw new VerifyError('$expected expected, but $times'
@@ skipping 163 matching lines @@
   const _ArgumentMatcher_anyString();
 
   @override
   bool matches(val) {
     return val is String;
   }
 }
 
 /// Matches any [String] value.
 final anyString = const _ArgumentMatcher_anyString() as dynamic;