@Test
	public void testNoCommentDifference() throws Exception {
		// 0x1002040: p1 has Plate, Pre, EOL, Post, & Repeatable comment.
		programBuilder1.createComment("0x1002040", "Plate Comment", CommentType.PLATE);
		programBuilder1.createComment("0x1002040", "Pre Comment", CommentType.PRE);
		programBuilder1.createComment("0x1002040", "EOL Comment", CommentType.EOL);
		programBuilder1.createComment("0x1002040", "Post Comment", CommentType.POST);
		programBuilder1.createComment("0x1002040", "Repeatable Comment", CommentType.REPEATABLE);
		programBuilder2.createComment("0x1002040", "Plate Comment", CommentType.PLATE);
		programBuilder2.createComment("0x1002040", "Pre Comment", CommentType.PRE);
		programBuilder2.createComment("0x1002040", "EOL Comment", CommentType.EOL);
		programBuilder2.createComment("0x1002040", "Post Comment", CommentType.POST);
		programBuilder2.createComment("0x1002040", "Repeatable Comment", CommentType.REPEATABLE);

		checkNoCommentDifference();
	}
Test that ProgramDiff can determine the memory reference differences
between Program1 and Program2 with same "from" address but different "to"
address.
Ghidra/Features/Base/src/test.slow/java/ghidra/program/util/ProgramDiff4Test.java