Generates invalid scss when formatting ampersand selectors

[erupenkman]

this input

 .btn{
   &:hover{
     background: blue;
   }
 }

produces this output space inserted between ampersand and 'hover'

 .btn {
   &: hover{
    background: blue;
   }
 }

this is invalid scss and will not compile (personally using libsass)

[bitwiseman]

184492f
is the commit that fixed this.