Fixes SI-6559 - StringContext not using passed in escape function.
Fixes SI-6559 - StringContext not using passed in escape function.

As reported by Curtis Stanford, with indication of what to fix.  standardInterpolator was not correctly
calling the passed in process function, so raw strings were not really raw.

lrytz/scala,slothspot/scala,shimib/scala,shimib/scala,slothspot/scala,jvican/scala,jvican/scala,scala/scala,scala/scala,lrytz/scala,scala/scala,martijnhoekstra/scala,lrytz/scala,felixmulder/scala,slothspot/scala,felixmulder/scala,shimib/scala,slothspot/scala,felixmulder/scala,felixmulder/scala,martijnhoekstra/scala,scala/scala,shimib/scala,jvican/scala,lrytz/scala,scala/scala,lrytz/scala,martijnhoekstra/scala,felixmulder/scala,shimib/scala,jvican/scala,jvican/scala,lrytz/scala,jvican/scala,slothspot/scala,martijnhoekstra/scala,martijnhoekstra/scala,scala/scala,felixmulder/scala,slothspot/scala,felixmulder/scala,jvican/scala,shimib/scala,martijnhoekstra/scala,slothspot/scala