Fixed tslint errors.

types/diff/diff-tests.ts

@@ -7,7 +7,7 @@ let diff = jsdiff.diffChars(one, other);
 diff.forEach(part => {
     const mark = part.added ? '+' :
         part.removed ? '-' : ' ';
-    console.log(mark + " " + part.value);
+    console.log(`${mark} ${part.value}`);
 });
 
 // --------------------------

types/diff/index.d.ts

@@ -4,18 +4,17 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
-
 export = JsDiff;
 export as namespace JsDiff;
 
 declare namespace JsDiff {
     interface ICaseOptions {
-        ignoreCase: boolean
+        ignoreCase: boolean;
     }
 
     interface ILinesOptions {
-        ignoreWhitespace?: boolean,
-        newlineIsToken?: boolean
+        ignoreWhitespace?: boolean;
+        newlineIsToken?: boolean;
     }
 
     interface IDiffResult {