patch 7.4.741
Problem:    When using += with ":set" a trailing comma is not recognized.
            (Issue 365)
Solution:   Don't add a second comma. Add a test. (partly by Christian
            Brabandt)
diff --git a/src/testdir/Make_amiga.mak b/src/testdir/Make_amiga.mak
index 102255d..e7c94c7 100644
--- a/src/testdir/Make_amiga.mak
+++ b/src/testdir/Make_amiga.mak
@@ -54,6 +54,7 @@
 		test_nested_function.out \
 		test_options.out \
 		test_qf_title.out \
+		test_set.out \
 		test_signs.out \
 		test_textobjects.out \
 		test_utf8.out
@@ -198,6 +199,7 @@
 test_nested_function.out: test_nested_function.in
 test_options.out: test_options.in
 test_qf_title.out: test_qf_title.in
+test_set.out: test_set.in
 test_signs.out: test_signs.in
 test_textobjects.out: test_textobjects.in
 test_utf8.out: test_utf8.in