nit: clarify truncation detection comment in ListReviews

Expand the inline comment at the page==maxPages check to more
explicitly explain why a full final page implies truncation.

github/review_test.go

@@ -2,9 +2,9 @@ package github
 
 import (
 	"context"
-	"fmt"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"io"
 	"net/http"
 	"strings"

github/reviews.go

@@ -197,8 +197,10 @@ func (c *Client) ListReviews(ctx context.Context, owner, repo string, number int
 			break
 		}
 
-		// If we just fetched page maxPages and it was full (the short-page break
+		// Truncation detection: this runs on the final allowed iteration
-		// above didn't fire), more reviews likely exist beyond our limit.
+		// (page == maxPages) only when the page was full (the len < perPage
+		// early-break above didn't fire). A full final page means additional
+		// reviews likely exist beyond our pagination limit.
 		if page == maxPages {
 			truncated = true
 		}
@@ -221,6 +223,7 @@ func (c *Client) DeleteReview(ctx context.Context, owner, repo string, number in
 	reqURL := fmt.Sprintf("%s/repos/%s/%s/pulls/%d/reviews/%d",
 		c.baseURL, url.PathEscape(owner), url.PathEscape(repo), number, reviewID)
 
+	// nil body: the GitHub DELETE endpoint for reviews requires no request body.
 	_, err := c.doRequestWithBody(ctx, http.MethodDelete, reqURL, nil)
 	if err != nil {
 		var apiErr *APIError