Add a space between constructor annotations and their parameter lists

[dominics]

Fixes #618 which, although closed due to inactivity, describes an improvement to spacing after constructor annotations - specifically, it'd be nice to retain a space between the constructor annotation and the first parameter list of the constructor. The desired spacing looks like:

class Foo @Inject() (bar: Bar) {

Whereas, currently, we'd remove the space, producing:

class Foo @Inject()(bar: Bar) {

[dominics]

I note that Play Framework documentation did use the space after @Inject()... until they reformatted their documentation examples with scalafmt 8 months ago! 🤣

[tanishiking]

Nice catch! LGTM

[ghostdogpr]

Was that intended that this is affecting cases without annotations as well?

I had

new ShardEntity(rts)(onMessage)

and now it gives me

new ShardEntity(rts) (onMessage)

[tanishiking]

@ghostdogpr Ugh, sorry it is unexpected behavior. Could you issue a ticket? (I'll be away from computer until tomorrow:bow:)

[ghostdogpr]

@tanishiking sure! here it is: #1528