Fix ESLint code violations

.mocharc.js

@@ -1,6 +1,6 @@
 module.exports = {
-    "spec": "tests/**/*.js",
-    "ignore": [
-        "tests/fixtures/**"
-    ],
-}
+  spec: "tests/**/*.js",
+  ignore: [
+    "tests/fixtures/**",
+  ],
+};

lib/postprocess.js

@@ -1,5 +1,5 @@
 const cache = require("./cache.js");
-const { coordinatesToIndex, indexToColumn } = require("./file_coordinates.js");
+const { coordinatesToIndex } = require("./file_coordinates.js");
 const { calculateOffset } = require("./offset_calculation.js");
 const { transformFix } = require("./autofix.js");
 

tests/postprocess.js

@@ -7,7 +7,7 @@ const cache = require("../lib/cache.js");
 
 describe("postprocess", () => {
   it("deletes file from cache after postprocessing", () => {
-    const text = `console.log("Hello world!");`;
+    const text = 'console.log("Hello world!");';
     const name = "testfile.js";
 
     pre(text, name);