@Test
	public void testGetCommentDifference4() throws Exception {
		// 0x1002306: p1 has pre-comment.
		programBuilder1.createComment("0x1002306", "My Pre Comment", CommentType.PRE);

		checkCommentDifference(0x1002306);
	}
Test that ProgramDiff can determine the code unit differences between
Program1 and Program2 where Data Settings differ.
Ghidra/Features/Base/src/test.slow/java/ghidra/program/util/ProgramDiff1Test.java