Escape assert strings

This fixes .string("var", "string with \n in it")

Author: vexcat

lib/binary_parser.ts

@@ -1003,7 +1003,7 @@ export class Parser {
         ctx.pushCode(`if (${this.options.assert} !== ${varName}) {`);
         break;
       case "string":
-        ctx.pushCode(`if ("${this.options.assert}" !== ${varName}) {`);
+        ctx.pushCode(`if (${JSON.stringify(this.options.assert)} !== ${varName}) {`);
         break;
       default:
         throw new Error(