@Test
	public void testGetCommentDifference18() throws Exception {
		// 0x1002a91: p2 has a plate comment.
		programBuilder2.createComment("0x1002a91", "This is a sample comment.", CommentType.PLATE);

		checkCommentDifference(0x1002a91);
	}
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