Recently I suggested an edit for a question that fixed several typos/grammar mistakes in the original question.
Immediatelly after hitting "Save Edits", I realized I had missed one typo. I went into the Review Suggested Edits page looking for a link to emend my suggested edit, but I could not find any.
Coincidentally, I clicked the "edit" link on the question once again to verify that the name of the action button on the next page was "Save Edits" (in order to write the sentence above), and I realized I could amend my suggested edit through there. Perhaps this functionality should be made more obvious in the Review Suggested Edits page.