fix #34

parser/src/python.lalrpop

@@ -411,7 +411,9 @@ Number: ast::Number = {
 };
 
 String: String = {
-  <s:string> => s,
+  <s:string+> => {
+    s.join("")
+  },
 };
 Identifier: String = <s:name> => s;
 

vm/src/pyobject.rs

@@ -770,7 +770,7 @@ impl PartialEq for PyObject {
                 PyObjectKind::Integer { value: ref v1i },
                 PyObjectKind::Integer { value: ref v2i },
             ) => v2i == v1i,
-            ( PyObjectKind::Float { value: ref v1i }, PyObjectKind::Float { value: ref v2i }) => {
+            (PyObjectKind::Float { value: ref v1i }, PyObjectKind::Float { value: ref v2i }) => {
                 v2i == v1i
             }
             (PyObjectKind::String { value: ref v1i }, PyObjectKind::String { value: ref v2i }) => {