Move multispan test to svg output

Author: estebank

tests/ui/codemap_tests/huge_multispan_highlight.rs

@@ -1,3 +1,7 @@
+//@ compile-flags: --error-format=human --color=always
+//@ ignore-windows
+// Temporary until next release:
+//@ ignore-stage2
 fn main() {
     let _ = match true {
         true => (
@@ -112,6 +116,6 @@ fn main() {
         
         
         
-        ", //~^^^^^^^^^^^^^^^^^^^^^^ ERROR `match` arms have incompatible types
+        ",
     };
 }