question: public Object source ( String filename , NameSpace nameSpace ) throws FileNotFoundException , IOException , EvalError { File file = pathToFile ( filename ) ; if ( Interpreter . DEBUG ) debug ( "Sourcing file: " + file ) ; Reader sourceIn = new BufferedReader ( new FileReader ( file ) ) ; try { return eval ( sourceIn , nameSpace , filename ) ; } finally { sourceIn . close ( ) ; } }
target:  Read text from fileName and eval it.