pkg/isolate: spelling fixes

lib/src/errors.dart

Index: lib/src/errors.dart
diff --git a/lib/src/errors.dart b/lib/src/errors.dart
index 55b383745feb438c8d6085ff3ca89cc74c3aa8f7..dd3b85d15a1841a227a50a2b53f6d4731063a170 100644
--- a/lib/src/errors.dart
+++ b/lib/src/errors.dart
@@ -46,7 +46,7 @@ class MultiError extends Error {
     int count = 0;
     int errors = 0;
     int values = 0;
-    // Initilized to `new List(count)` when count is known.
+    // Initialized to `new List(count)` when count is known.
     // Filled up with values on the left, errors on the right.
     // Order is not preserved.
     List results;
@@ -103,7 +103,7 @@ class MultiError extends Error {
     int count = 0;
     bool hasError = false;
     int completed = 0;
-    // Initalized to `new List(count)` when count is known.
+    // Initialized to `new List(count)` when count is known.
     // Filled with values until the first error, then cleared
     // and filled with errors.
     List results;