Add new edge_cases test

Author: yaahc

tests/everything/skip-multi-option-lints.fixed.rs tests/edge-cases/skip-multi-option-lints.fixed.rs

@@ -0,0 +1,10 @@
+extern crate rustfix;
+use std::collections::HashSet;
+use std::fs;
+
+#[test]
+fn multiple_fix_options_yield_no_suggestions() {
+    let json = fs::read_to_string("./tests/edge-cases/skip-multi-option-lints.json").unwrap();
+    let expected_suggestions = rustfix::get_suggestions_from_json(&json, &HashSet::new()).unwrap();
+    assert!(expected_suggestions.is_empty());
+}