Fix typos.

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Replacing more num with double in API
Merge pull request #4 from dominichamon/no_num

Replacing more num with double in API
Typo.

Signed-off-by: John McCutchan <john@johnmccutchan.com>
dart:typed_data library.

Signed-off-by: John McCutchan <john@johnmccutchan.com>