fix: Fix incorrect text being copied by copy button on tickets page

The merge step for using `pt` added the wrong text to the copy button.

Author: flaix

src/main/java/com/gitblit/wicket/pages/TicketPage.java

@@ -1561,7 +1561,7 @@ protected Component getMergeInstructions(UserModel user, RepositoryModel reposit
 		// pt instructions
 		String ptStep = MessageFormat.format("pt pull {0,number,0}", ticket.number);
 		cmd.add(new Label("ptMergeStep", ptStep));
-		cmd.add(createCopyFragment("ptMergeCopyStep", step1.replace("\n", " && ")));
+		cmd.add(createCopyFragment("ptMergeCopyStep", ptStep.replace("\n", " && ")));
 		return cmd;
 	}