chore(cloud-rad): Add code fencing (#641)

## Code fencing
Code examples need code fencing around them to distingish from
rich text for TSDoc.

Internally b/179483748

Script used:
https://github.com/fhinkel/cloud-rad-script/blob/main/fixExampleComments.js

packages/google-cloud-compute/src/v1/accelerator_types_client.ts

@@ -366,7 +366,9 @@ export class AcceleratorTypesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#regular-methods)
    *   for more details and examples.
    * @example
+   * ```
    * const [response] = await client.get(request);
+   * ```
    */
   get(
     request?: protos.google.cloud.compute.v1.IGetAcceleratorTypeRequest,
@@ -453,10 +455,12 @@ export class AcceleratorTypesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.aggregatedListAsync(request);
    * for await (const [key, value] of iterable) {
    *   // process response
    * }
+   * ```
    */
   aggregatedListAsync(
     request?: protos.google.cloud.compute.v1.IAggregatedListAcceleratorTypesRequest,
@@ -696,10 +700,12 @@ export class AcceleratorTypesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.listAsync(request);
    * for await (const response of iterable) {
    *   // process response
    * }
+   * ```
    */
   listAsync(
     request?: protos.google.cloud.compute.v1.IListAcceleratorTypesRequest,

packages/google-cloud-compute/src/v1/addresses_client.ts

@@ -376,7 +376,9 @@ export class AddressesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.delete(request);
+   * ```
    */
   delete(
     request?: protos.google.cloud.compute.v1.IDeleteAddressRequest,
@@ -485,7 +487,9 @@ export class AddressesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#regular-methods)
    *   for more details and examples.
    * @example
+   * ```
    * const [response] = await client.get(request);
+   * ```
    */
   get(
     request?: protos.google.cloud.compute.v1.IGetAddressRequest,
@@ -583,7 +587,9 @@ export class AddressesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.insert(request);
+   * ```
    */
   insert(
     request?: protos.google.cloud.compute.v1.IInsertAddressRequest,
@@ -688,10 +694,12 @@ export class AddressesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.aggregatedListAsync(request);
    * for await (const [key, value] of iterable) {
    *   // process response
    * }
+   * ```
    */
   aggregatedListAsync(
     request?: protos.google.cloud.compute.v1.IAggregatedListAddressesRequest,
@@ -929,10 +937,12 @@ export class AddressesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.listAsync(request);
    * for await (const response of iterable) {
    *   // process response
    * }
+   * ```
    */
   listAsync(
     request?: protos.google.cloud.compute.v1.IListAddressesRequest,

packages/google-cloud-compute/src/v1/autoscalers_client.ts

@@ -382,7 +382,9 @@ export class AutoscalersClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.delete(request);
+   * ```
    */
   delete(
     request?: protos.google.cloud.compute.v1.IDeleteAutoscalerRequest,
@@ -493,7 +495,9 @@ export class AutoscalersClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#regular-methods)
    *   for more details and examples.
    * @example
+   * ```
    * const [response] = await client.get(request);
+   * ```
    */
   get(
     request?: protos.google.cloud.compute.v1.IGetAutoscalerRequest,
@@ -597,7 +601,9 @@ export class AutoscalersClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.insert(request);
+   * ```
    */
   insert(
     request?: protos.google.cloud.compute.v1.IInsertAutoscalerRequest,
@@ -721,7 +727,9 @@ export class AutoscalersClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.patch(request);
+   * ```
    */
   patch(
     request?: protos.google.cloud.compute.v1.IPatchAutoscalerRequest,
@@ -847,7 +855,9 @@ export class AutoscalersClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.update(request);
+   * ```
    */
   update(
     request?: protos.google.cloud.compute.v1.IUpdateAutoscalerRequest,
@@ -954,10 +964,12 @@ export class AutoscalersClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.aggregatedListAsync(request);
    * for await (const [key, value] of iterable) {
    *   // process response
    * }
+   * ```
    */
   aggregatedListAsync(
     request?: protos.google.cloud.compute.v1.IAggregatedListAutoscalersRequest,
@@ -1195,10 +1207,12 @@ export class AutoscalersClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.listAsync(request);
    * for await (const response of iterable) {
    *   // process response
    * }
+   * ```
    */
   listAsync(
     request?: protos.google.cloud.compute.v1.IListAutoscalersRequest,

packages/google-cloud-compute/src/v1/backend_buckets_client.ts

@@ -378,7 +378,9 @@ export class BackendBucketsClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.addSignedUrlKey(request);
+   * ```
    */
   addSignedUrlKey(
     request?: protos.google.cloud.compute.v1.IAddSignedUrlKeyBackendBucketRequest,
@@ -502,7 +504,9 @@ export class BackendBucketsClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.delete(request);
+   * ```
    */
   delete(
     request?: protos.google.cloud.compute.v1.IDeleteBackendBucketRequest,
@@ -628,7 +632,9 @@ export class BackendBucketsClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.deleteSignedUrlKey(request);
+   * ```
    */
   deleteSignedUrlKey(
     request?: protos.google.cloud.compute.v1.IDeleteSignedUrlKeyBackendBucketRequest,
@@ -741,7 +747,9 @@ export class BackendBucketsClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#regular-methods)
    *   for more details and examples.
    * @example
+   * ```
    * const [response] = await client.get(request);
+   * ```
    */
   get(
     request?: protos.google.cloud.compute.v1.IGetBackendBucketRequest,
@@ -845,7 +853,9 @@ export class BackendBucketsClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.insert(request);
+   * ```
    */
   insert(
     request?: protos.google.cloud.compute.v1.IInsertBackendBucketRequest,
@@ -971,7 +981,9 @@ export class BackendBucketsClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.patch(request);
+   * ```
    */
   patch(
     request?: protos.google.cloud.compute.v1.IPatchBackendBucketRequest,
@@ -1097,7 +1109,9 @@ export class BackendBucketsClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.update(request);
+   * ```
    */
   update(
     request?: protos.google.cloud.compute.v1.IUpdateBackendBucketRequest,
@@ -1368,10 +1382,12 @@ export class BackendBucketsClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.listAsync(request);
    * for await (const response of iterable) {
    *   // process response
    * }
+   * ```
    */
   listAsync(
     request?: protos.google.cloud.compute.v1.IListBackendBucketsRequest,

packages/google-cloud-compute/src/v1/backend_services_client.ts

@@ -386,7 +386,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.addSignedUrlKey(request);
+   * ```
    */
   addSignedUrlKey(
     request?: protos.google.cloud.compute.v1.IAddSignedUrlKeyBackendServiceRequest,
@@ -510,7 +512,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.delete(request);
+   * ```
    */
   delete(
     request?: protos.google.cloud.compute.v1.IDeleteBackendServiceRequest,
@@ -636,7 +640,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.deleteSignedUrlKey(request);
+   * ```
    */
   deleteSignedUrlKey(
     request?: protos.google.cloud.compute.v1.IDeleteSignedUrlKeyBackendServiceRequest,
@@ -749,7 +755,9 @@ export class BackendServicesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#regular-methods)
    *   for more details and examples.
    * @example
+   * ```
    * const [response] = await client.get(request);
+   * ```
    */
   get(
     request?: protos.google.cloud.compute.v1.IGetBackendServiceRequest,
@@ -850,7 +858,9 @@ export class BackendServicesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#regular-methods)
    *   for more details and examples.
    * @example
+   * ```
    * const [response] = await client.getHealth(request);
+   * ```
    */
   getHealth(
     request?: protos.google.cloud.compute.v1.IGetHealthBackendServiceRequest,
@@ -957,7 +967,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.insert(request);
+   * ```
    */
   insert(
     request?: protos.google.cloud.compute.v1.IInsertBackendServiceRequest,
@@ -1083,7 +1095,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.patch(request);
+   * ```
    */
   patch(
     request?: protos.google.cloud.compute.v1.IPatchBackendServiceRequest,
@@ -1209,7 +1223,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.setSecurityPolicy(request);
+   * ```
    */
   setSecurityPolicy(
     request?: protos.google.cloud.compute.v1.ISetSecurityPolicyBackendServiceRequest,
@@ -1335,7 +1351,9 @@ export class BackendServicesClient {
    *   and might get backwards-incompatible changes at any time.
    *   `.promise()` is not supported yet.
    * @example
+   * ```
    * const [operation] = await client.update(request);
+   * ```
    */
   update(
     request?: protos.google.cloud.compute.v1.IUpdateBackendServiceRequest,
@@ -1442,10 +1460,12 @@ export class BackendServicesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.aggregatedListAsync(request);
    * for await (const [key, value] of iterable) {
    *   // process response
    * }
+   * ```
    */
   aggregatedListAsync(
     request?: protos.google.cloud.compute.v1.IAggregatedListBackendServicesRequest,
@@ -1677,10 +1697,12 @@ export class BackendServicesClient {
    *   [documentation](https://github.com/googleapis/gax-nodejs/blob/master/client-libraries.md#auto-pagination)
    *   for more details and examples.
    * @example
+   * ```
    * const iterable = client.listAsync(request);
    * for await (const response of iterable) {
    *   // process response
    * }
+   * ```
    */
   listAsync(
     request?: protos.google.cloud.compute.v1.IListBackendServicesRequest,