diff --git a/app.js b/app.js
index c3367a1..c8cca45 100644
--- a/app.js
+++ b/app.js
@@ -82,7 +82,10 @@ var console = {
             }
         }
         
-        var message = type + ": " + messages.join(' ');
+        var message = messages.join(' ');
+        if (typeof type !== "undefined") {
+            message = type + ": " + message;
+        }
         this._echoDefault(message);
         this._messages.push(message);
 
diff --git a/app/assets/js/numbers-0.7.0.wsh.js b/app/assets/js/numbers-0.7.0.wsh.js
index 0725cf1..fb4a1d6 100644
--- a/app/assets/js/numbers-0.7.0.wsh.js
+++ b/app/assets/js/numbers-0.7.0.wsh.js
@@ -1471,8 +1471,8 @@ matrix.determinant = function (m) {
     while (numberOfAddedRows < numRow - 1) {
       newArray.push(m[numberOfAddedRows + 1].slice(0, indexColumn).concat(m[numberOfAddedRows + 1].slice(indexColumn + 1)));
       numberOfAddedRows++;
-	}
-	
+    }
+    
     result += Math.pow(-1, indexColumn) * m[0][indexColumn] * matrix.determinant(newArray);
     indexColumn++;
   }