New test 103 and clippy fixes

examples/acceptance_tests/103/lib/tests.ak

@@ -0,0 +1,13 @@
+fn do_diagnostic(self: Data) -> ByteArray {
+  let builder = 2
+
+  from_int(builder)
+}
+
+fn from_int(i: Int) -> ByteArray {
+  "dddd"
+}
+
+test other() {
+  do_diagnostic(1) != "thing"
+}