ionic g page child doesn't update nearest routing module

**Description:**
I'm generating module with --routing option.
If I generate child page to this module, routing.module.ts is marked as updated but in fact it is not.

**Steps to Reproduce:**

`ionic start errorgene blank`
`cd errorgene`
`ionic g module todos --routing`
`ionic g page todos/todos-list`

**Output:**

For the following command `ionic g page todos/todos-list`

> CREATE src/app/todos/todos-list/todos-list.module.ts (559 bytes)
CREATE src/app/todos/todos-list/todos-list.page.html (129 bytes)
CREATE src/app/todos/todos-list/todos-list.page.spec.ts (713 bytes)
CREATE src/app/todos/todos-list/todos-list.page.ts (271 bytes)
CREATE src/app/todos/todos-list/todos-list.page.scss (0 bytes)
UPDATE src/app/todos/todos-routing.module.ts (248 bytes)
[OK] Generated page!

but todos-routing.module.ts is not updated

`import { NgModule } from '@angular/core';`
`import { Routes, RouterModule } from '@angular/router';`

`const routes: Routes = [];`

`@NgModule({
imports: [RouterModule.forChild(routes)],
exports: [RouterModule]
})
export class TodosRoutingModule { }`

**My `ionic info`:**

```
Ionic:

ionic (Ionic CLI) : 4.12.0 (C:\Users\hugob\AppData\Roaming\npm\node_modules\ionic)
Ionic Framework : @ionic/angular 4.1.2
@angular-devkit/build-angular : 0.13.7
@angular-devkit/schematics : 7.2.4
@angular/cli : 7.3.7
@ionic/angular-toolkit : 1.4.1

System:

NodeJS : v10.15.3 (C:\Program Files\nodejs\node.exe)
npm : 6.4.1
OS : Windows 10
```