docs(common): add new date format example to documentation (#51359)

PR Close #51359

packages/common/src/pipes/date_pipe.ts

@@ -52,8 +52,9 @@ export const DATE_PIPE_DEFAULT_TIMEZONE = new InjectionToken<string>('DATE_PIPE_
  * ]
  * ```
  */
-export const DATE_PIPE_DEFAULT_OPTIONS =
-    new InjectionToken<DatePipeConfig>('DATE_PIPE_DEFAULT_OPTIONS');
+export const DATE_PIPE_DEFAULT_OPTIONS = new InjectionToken<DatePipeConfig>(
+    'DATE_PIPE_DEFAULT_OPTIONS',
+);
 
 // clang-format off
 /**
@@ -190,6 +191,7 @@ export const DATE_PIPE_DEFAULT_OPTIONS =
  * {{ dateObj | date:'medium' }}      // output is 'Jun 15, 2015, 9:43:11 PM'
  * {{ dateObj | date:'shortTime' }}   // output is '9:43 PM'
  * {{ dateObj | date:'mm:ss' }}       // output is '43:11'
+ * {{ dateObj | date:"MMM dd, yyyy 'at' hh:mm a" }}  // output is 'Jun 15, 2015 at 09:43 PM'
  * ```
  *
  * ### Usage example
@@ -245,15 +247,25 @@ export class DatePipe implements PipeTransform {
    *
    * @returns A date string in the desired format.
    */
-  transform(value: Date|string|number, format?: string, timezone?: string, locale?: string): string
-      |null;
+  transform(
+      value: Date|string|number,
+      format?: string,
+      timezone?: string,
+      locale?: string,
+      ): string|null;
   transform(value: null|undefined, format?: string, timezone?: string, locale?: string): null;
   transform(
-      value: Date|string|number|null|undefined, format?: string, timezone?: string,
-      locale?: string): string|null;
+      value: Date|string|number|null|undefined,
+      format?: string,
+      timezone?: string,
+      locale?: string,
+      ): string|null;
   transform(
-      value: Date|string|number|null|undefined, format?: string, timezone?: string,
-      locale?: string): string|null {
+      value: Date|string|number|null|undefined,
+      format?: string,
+      timezone?: string,
+      locale?: string,
+      ): string|null {
     if (value == null || value === '' || value !== value) return null;
 
     try {