@@ -675,57 +675,57 @@ func (s service) EditComment(ctx context.Context, rs string, id uint64, cr chang
				return change.Comment{}, err
			}
			subjectID = q.Node.IssueComment.ID
			viewerHasReacted = q.Node.IssueComment.Reactions.ViewerHasReacted
			viewer = ghUser(&q.Viewer)
		case strings.HasPrefix(cr.ID, "r"):
			reviewID := "017:PullRequestReview" + cr.ID[len("r"):]
		case strings.HasPrefix(cr.ID, "rc"):
			commentID := "024:PullRequestReviewComment" + cr.ID[len("rc"):]
			var q struct {
				Node struct {
					PullRequestReview struct {
					PullRequestReviewComment struct {
						ID        githubv4.ID
						Reactions struct {
							ViewerHasReacted bool
						} `graphql:"reactions(content:$reactionContent)"`
					} `graphql:"...on PullRequestReview"`
				} `graphql:"node(id:$reviewID)"`
					} `graphql:"...on PullRequestReviewComment"`
				} `graphql:"node(id:$commentID)"`
				Viewer githubV4User
			}
			variables := map[string]interface{}{
				"reviewID":        githubv4.ID(base64.StdEncoding.EncodeToString([]byte(reviewID))), // HACK, TODO: Confirm StdEncoding vs URLEncoding.
				"commentID":       githubv4.ID(base64.StdEncoding.EncodeToString([]byte(commentID))), // HACK, TODO: Confirm StdEncoding vs URLEncoding.
				"reactionContent": reactionContent,
			}
			err = s.clV4.Query(ctx, &q, variables)
			if err != nil {
				return change.Comment{}, err
			}
			subjectID = q.Node.PullRequestReview.ID
			viewerHasReacted = q.Node.PullRequestReview.Reactions.ViewerHasReacted
			subjectID = q.Node.PullRequestReviewComment.ID
			viewerHasReacted = q.Node.PullRequestReviewComment.Reactions.ViewerHasReacted
			viewer = ghUser(&q.Viewer)
		case strings.HasPrefix(cr.ID, "rc"):
			commentID := "024:PullRequestReviewComment" + cr.ID[len("rc"):]
		case strings.HasPrefix(cr.ID, "r"):
			reviewID := "017:PullRequestReview" + cr.ID[len("r"):]
			var q struct {
				Node struct {
					PullRequestReviewComment struct {
					PullRequestReview struct {
						ID        githubv4.ID
						Reactions struct {
							ViewerHasReacted bool
						} `graphql:"reactions(content:$reactionContent)"`
					} `graphql:"...on PullRequestReviewComment"`
				} `graphql:"node(id:$commentID)"`
					} `graphql:"...on PullRequestReview"`
				} `graphql:"node(id:$reviewID)"`
				Viewer githubV4User
			}
			variables := map[string]interface{}{
				"commentID":       githubv4.ID(base64.StdEncoding.EncodeToString([]byte(commentID))), // HACK, TODO: Confirm StdEncoding vs URLEncoding.
				"reviewID":        githubv4.ID(base64.StdEncoding.EncodeToString([]byte(reviewID))), // HACK, TODO: Confirm StdEncoding vs URLEncoding.
				"reactionContent": reactionContent,
			}
			err = s.clV4.Query(ctx, &q, variables)
			if err != nil {
				return change.Comment{}, err
			}
			subjectID = q.Node.PullRequestReviewComment.ID
			viewerHasReacted = q.Node.PullRequestReviewComment.Reactions.ViewerHasReacted
			subjectID = q.Node.PullRequestReview.ID
			viewerHasReacted = q.Node.PullRequestReview.Reactions.ViewerHasReacted
			viewer = ghUser(&q.Viewer)
		default:
			return change.Comment{}, fmt.Errorf("EditComment: unrecognized kind of comment ID: %q", cr.ID)
		}