Add test

Author: pd3

test/fill-tags.func.1.out

@@ -0,0 +1,4 @@
+1	150	.	C	T	.	.	AD=0,0,0	AD:AB	.:.	.:.
+1	153	.	C	T	.	.	AD=0,0,21	AD:AB	.,.,.:.	0,0,210:0
+1	154	.	C	T	.	.	AD=30,13,0	AD:AB	30,13,0:0.697674	300,13,0:0.958466
+1	155	.	C	T	.	.	AD=20,0,10	AD:AB	20,0,10:0.666667	200,0,10:0.952381