fixes skygragon#7: handle '\n' correctly

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/test.js

@@ -59,7 +59,7 @@ cmd.handler = function(argv) {
     if (e) return console.log('ERROR:', e);
 
     problem.file = argv.filename;
-    problem.testcase = testcase.replace('\\n', '\n');
+    problem.testcase = testcase.replace(/\\n/g, '\n');
 
     console.log('\nInput data:');
     console.log(problem.testcase);