Improve test/test_mod.c

Stop test/test_mod from writing trailing whitespace, to make
commiting the outputs easier for developers using pre-commit
checks for whitespace issues.

Remove array `out`, as it's contents were never used, or even set
due to conditionals on argc.  This also allows the output to be
written directly to stdout instead of going through an intermediate
buffer.

test/base_mods/MM-chebi.out

@@ -1,48 +1,48 @@
-0	A	
-1	G	
-2	C	
-3	T	
-4	C	
-5	T	
-6	C	C+m102 
-7	C	
-8	A	
-9	G	
-10	A	
-11	G	
-12	T	
-13	C	
-14	G	
-15	N	N+n212 
-16	A	
-17	C	C+m128 
-18	G	
-19	C	C+(76792)161 
-20	C	C+m153 
-21	A	
-22	T	
-23	Y	
-24	C	
-25	G	
-26	C	
-27	G	
-28	C	
-29	G	
-30	C	
-31	C	C+m179 
-32	A	
-33	C	
-34	C	C+m204 C+(76792)33 
-35	A	
+0	A
+1	G
+2	C
+3	T
+4	C
+5	T
+6	C	C+m102
+7	C
+8	A
+9	G
+10	A
+11	G
+12	T
+13	C
+14	G
+15	N	N+n212
+16	A
+17	C	C+m128
+18	G
+19	C	C+(76792)161
+20	C	C+m153
+21	A
+22	T
+23	Y
+24	C
+25	G
+26	C
+27	G
+28	C
+29	G
+30	C
+31	C	C+m179
+32	A
+33	C
+34	C	C+m204 C+(76792)33
+35	A
 ---
 Present: m. #-76792. n.
-6	C	C+m102 
-15	N	N+n212 
-17	C	C+m128 
-19	C	C+(76792)161 
-20	C	C+m153 
-31	C	C+m179 
-34	C	C+m204 C+(76792)33 
+6	C	C+m102
+15	N	N+n212
+17	C	C+m128
+19	C	C+(76792)161
+20	C	C+m153
+31	C	C+m179
+34	C	C+m204 C+(76792)33
 
 ===
 

test/base_mods/MM-double.out

@@ -1,48 +1,48 @@
-0	A	
-1	G	G-m115 
-2	G	
-3	A	
-4	T	
-5	C	
-6	T	
-7	C	C+m128 
-8	T	
-9	A	
-10	G	
-11	C	
-12	G	G-m141 
-13	G	G-m166 G+o102 
-14	A	
-15	T	
-16	C	
-17	G	
-18	G	
-19	C	
-20	G	
-21	G	
-22	G	G-m192 
-23	G	
-24	G	
-25	A	
-26	T	
-27	A	
-28	T	
-29	G	
-30	C	C+m153 
-31	C	C+m179 
-32	A	
-33	T	
-34	A	
-35	T	
+0	A
+1	G	G-m115
+2	G
+3	A
+4	T
+5	C
+6	T
+7	C	C+m128
+8	T
+9	A
+10	G
+11	C
+12	G	G-m141
+13	G	G-m166 G+o102
+14	A
+15	T
+16	C
+17	G
+18	G
+19	C
+20	G
+21	G
+22	G	G-m192
+23	G
+24	G
+25	A
+26	T
+27	A
+28	T
+29	G
+30	C	C+m153
+31	C	C+m179
+32	A
+33	T
+34	A
+35	T
 ---
 Present: m. m. o.
-1	G	G-m115 
-7	C	C+m128 
-12	G	G-m141 
-13	G	G-m166 G+o102 
-22	G	G-m192 
-30	C	C+m153 
-31	C	C+m179 
+1	G	G-m115
+7	C	C+m128
+12	G	G-m141
+13	G	G-m166 G+o102
+22	G	G-m192
+30	C	C+m153
+31	C	C+m179
 
 ===
 

test/base_mods/MM-explicit-f.out

@@ -1,111 +1,111 @@
-0	A	
-1	T	
-2	C	
-3	A	
-4	T	
-5	C	
-6	A	
-7	T	
-8	T	
-9	C	C+m200 C+h10 
-10	C	C+m50 C+h170 
-11	T	
-12	A	
-13	C	
-14	C	C+m160 C+h20 
-15	G	
-16	C	
-17	T	
-18	A	
-19	T	
-20	A	
-21	G	
-22	C	
-23	C	
-24	T	
+0	A
+1	T
+2	C
+3	A
+4	T
+5	C
+6	A
+7	T
+8	T
+9	C	C+m200 C+h10
+10	C	C+m50 C+h170
+11	T
+12	A
+13	C
+14	C	C+m160 C+h20
+15	G
+16	C
+17	T
+18	A
+19	T
+20	A
+21	G
+22	C
+23	C
+24	T
 ---
 Present: m. h.
-9	C	C+m200 C+h10 
-10	C	C+m50 C+h170 
-14	C	C+m160 C+h20 
+9	C	C+m200 C+h10
+10	C	C+m50 C+h170
+14	C	C+m160 C+h20
 
 ===
 
-0	A	
-1	T	
-2	C	C+m# C+h# 
-3	A	
-4	T	
-5	C	C+m# C+h# 
-6	A	
-7	T	
-8	T	
-9	C	C+m200 C+h10 
-10	C	C+m50 C+h170 
-11	T	
-12	A	
-13	C	C+m10 C+h5 
-14	C	C+m160 C+h20 
-15	G	
-16	C	C+m10 C+h5 
-17	T	
-18	A	
-19	T	
-20	A	
-21	G	
-22	C	C+m# C+h# 
-23	C	C+m# C+h# 
-24	T	
+0	A
+1	T
+2	C	C+m# C+h#
+3	A
+4	T
+5	C	C+m# C+h#
+6	A
+7	T
+8	T
+9	C	C+m200 C+h10
+10	C	C+m50 C+h170
+11	T
+12	A
+13	C	C+m10 C+h5
+14	C	C+m160 C+h20
+15	G
+16	C	C+m10 C+h5
+17	T
+18	A
+19	T
+20	A
+21	G
+22	C	C+m# C+h#
+23	C	C+m# C+h#
+24	T
 ---
 Present: m? h?
-2	C	C+m# C+h# 
-5	C	C+m# C+h# 
-9	C	C+m200 C+h10 
-10	C	C+m50 C+h170 
-13	C	C+m10 C+h5 
-14	C	C+m160 C+h20 
-16	C	C+m10 C+h5 
-22	C	C+m# C+h# 
-23	C	C+m# C+h# 
+2	C	C+m# C+h#
+5	C	C+m# C+h#
+9	C	C+m200 C+h10
+10	C	C+m50 C+h170
+13	C	C+m10 C+h5
+14	C	C+m160 C+h20
+16	C	C+m10 C+h5
+22	C	C+m# C+h#
+23	C	C+m# C+h#
 
 ===
 
-0	A	
-1	T	
-2	C	C+h# 
-3	A	
-4	T	
-5	C	C+h# 
-6	A	
-7	T	
-8	T	
-9	C	C+m200 C+h10 
-10	C	C+h170 
-11	T	
-12	A	
-13	C	C+h5 
-14	C	C+m160 C+h20 
-15	G	
-16	C	C+h5 
-17	T	
-18	A	
-19	T	
-20	A	
-21	G	
-22	C	C+h# 
-23	C	C+h# 
-24	T	
+0	A
+1	T
+2	C	C+h#
+3	A
+4	T
+5	C	C+h#
+6	A
+7	T
+8	T
+9	C	C+m200 C+h10
+10	C	C+h170
+11	T
+12	A
+13	C	C+h5
+14	C	C+m160 C+h20
+15	G
+16	C	C+h5
+17	T
+18	A
+19	T
+20	A
+21	G
+22	C	C+h#
+23	C	C+h#
+24	T
 ---
 Present: m. h?
-2	C	C+h# 
-5	C	C+h# 
-9	C	C+m200 C+h10 
-10	C	C+h170 
-13	C	C+h5 
-14	C	C+m160 C+h20 
-16	C	C+h5 
-22	C	C+h# 
-23	C	C+h# 
+2	C	C+h#
+5	C	C+h#
+9	C	C+m200 C+h10
+10	C	C+h170
+13	C	C+h5
+14	C	C+m160 C+h20
+16	C	C+h5
+22	C	C+h#
+23	C	C+h#
 
 ===