What happened
----------------------
Javadoc snippet output displays class name defined in the "target" attribute of @link tag instead of white space hyperlink.

How to reproduce
------------------------
use below code and generate javadoc using jdk-18.

public class TestJavaDoc{
/**
     * {@snippet :
     * class HelloWorld {
     * public static void main(String... args) {
     * System.out.println("Hello World!");// @highlight substring=" " type="highlighted"
     * System.out.println("Hello World!");// @link substring=" " target="System#out"
     * }
     * }
     * }
     */

public void errorsInLinkTag(){}
}

Actual Output (PFA)
-------------------
For highlight tag, output is correct.
For link tag, "System " is displayed over the white space.

Expected Output:
-----------------------
White space used in substring or regex handled properly with hyperlink.