fix: drop only control character references from Markdown, keep escaped quotes in env files, reject prefill-less inline comment edits, relabel the token's account

Signed-off-by: bircni <bircni@icloud.com>

internal/app/comments.go

@@ -187,6 +187,10 @@ func (a *application) comment(cmd *cobra.Command, arg string, kind refKind, chan
 
 // editComment replaces the text of comment, prefilling the prompt or editor with it.
 func (a *application) editComment(cmd *cobra.Command, t target, comment services.Comment, f commentFlags) (runErr error) {
+	// An inline review comment is not fetched, so there is no text to start from.
+	if comment.Author == "" && !cmd.Flags().Changed("body") && !cmd.Flags().Changed("body-file") {
+		return clierr.Wrap(clierr.Usage, errors.New("an inline review comment cannot be prefilled; supply --body or --body-file"))
+	}
 	body, draft, err := a.readComment(cmd, f, comment.Body)
 	defer finishDraft(&draft, &runErr)
 	if err != nil {