+##insert1
-##bla
+##bla (changed)
+##insert2
+##insert3
-chr1	120270301	120270301	A	C	hom	11.1	12
-chrY	8979472	8979472	T	G	hom	15.6	20
Difference summary:
comment lines added: 4
comment lines removed: 1
content lines removed: 2