Add quotemark rule to tslint.

src/kernels/backend_webgl.ts

@@ -55,7 +55,7 @@ import {Pool2DProgram} from './webgl/pool_gpu';
 import {ReduceProgram} from './webgl/reduce_gpu';
 import {ResizeBilinearProgram} from './webgl/resize_bilinear_gpu';
 // tslint:disable-next-line:max-line-length
-import {ResizeNearestNeighborProgram} from "./webgl/resize_nearest_neighbor_gpu";
+import {ResizeNearestNeighborProgram} from './webgl/resize_nearest_neighbor_gpu';
 import {ReverseProgram} from './webgl/reverse_gpu';
 import {SliceProgram} from './webgl/slice_gpu';
 import {TextureData, TextureType} from './webgl/tex_util';

src/ops/unary_ops_test.ts

@@ -2448,7 +2448,7 @@ describeWithFlags('erf', ALL_ENVS, () => {
   });
 
   it('scalar in int32', () => {
-    const a = tf.scalar(1, "int32");
+    const a = tf.scalar(1, 'int32');
     const result = tf.erf(a);
       const expected = [0.8427008];
       expectArraysClose(result, expected);

tslint.json

@@ -43,6 +43,7 @@
     "object-literal-shorthand": true,
     "only-arrow-functions": [true, "allow-declarations", "allow-named-functions"],
     "prefer-const": true,
+    "quotemark": [true, "single"],
     "radix": true,
     "restrict-plus-operands": true,
     "semicolon": [true, "always", "ignore-bound-class-methods"],