Spelling fixes e to i.

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 8e312063943e96fc9f47f741e98234673b6e60c4..3becc94b9dbbb66fb4c1d0636130a6a2ad613cab 100644
--- a/pkg/expect/lib/expect.dart
+++ b/pkg/expect/lib/expect.dart
@@ -440,7 +440,7 @@ class Expect {
       [_CheckExceptionFn check = null, String reason = null]) {
     String msg = reason == null ? "" : "($reason)";
     if (f is! _Nullary) {
-      // Only throws from executing the funtion body should count as throwing.
+      // Only throws from executing the function body should count as throwing.
       // The failure to even call `f` should throw outside the try/catch.
       _fail("Expect.throws$msg: Function f not callable with zero arguments");
     }