Add non-breaking spaces after 'return'

[BoD]

With fields with long names, the generated code could look like this:

 return
      FieldWithAVeryLongName().apply(block).build()
}

instead of:

 return FieldWithAVeryLongName().apply(block).build()
}

which made the compiler choke.

Also added the character in all return places just in case!

Thank you @StylianosGakis for reporting this!

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[StylianosGakis]

Amazing 🥳🥳🥳