Add leading spaces to routes.swift

[tockrock]

Currently when creating a new project without leaf, leading spaces are missing in ./Sources/App/routes.swift

func routes(_ app: Application) throws {
app.get { req async in

This PR adds the missing leading spaces to match expectation

func routes(_ app: Application) throws {
    app.get { req async in

Alternative considered modification was to move the mustache selection earlier, but caused Error: Mustache error: bad unescape tag, and was not able to find solution to resolve the issue.

func routes(_ app: Application) throws {{{#leaf}}
    app.get { req async throws in
        try await req.view.render("index", ["title": "Hello Vapor!"])
    }{{/leaf}}{{^leaf}}
    app.get { req async in

[0xTim]

Thanks!

[0xTim]

For context, this looks like it was caused by the recent Mustache updates.

Why we haven't transitioned over to Leaf I don't know!

[gwynne]

'Cause I was lazy when I did the update 😅. Thanks for this!

[tockrock]

Thanks!