message: Extended `@see` with `startWith` and `endWith`
  Extended `@see` with `startWith` and `endWith`  as they are also concat variants
diff: @@ -116,6 +116,8 @@ export function concat<A extends ObservableInput<any>[]>(...observables: A): Obs
  * @see {@link concatAll}
  * @see {@link concatMap}
  * @see {@link concatMapTo}
  + * @see {@link startWith}
  + * @see {@link endWith}
  *
  * @param input1 An input Observable to concatenate with others.
  * @param input2 An input Observable to concatenate with others.
  