Fix if then statement layout in Scaffolder.

Fixes the Travis build error:

```
Scaffolding/Scaffolder.hs:99:34:
    Unexpected semi-colons in conditional:
        if isBare; then LT.replace "cd PROJECTNAME && " ""; else LT.replace
                                                                   "PROJECTNAME" (LT.pack project)
    Perhaps you meant to use -XDoAndIfThenElse?
```