Here documents and interpolated strings via quasiquotation; profiling libraries

 This library adds support for multi-line string literals (a.k.a. "here docs")
 and string interpolation to Haskell via GHC's QuasiQuotes extension. The
 quoted expressions behave like string literals in the source code; that is,
 they produce values of type String, or, with the OverloadedStrings language
 extension enabled, values of type IsString a => a.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.