diff --git a/src/main/java/ch/hearc/ig/odi/stringcalculatortdd/StringCalculator.java b/src/main/java/ch/hearc/ig/odi/stringcalculatortdd/StringCalculator.java
index 53c991c..3dcf00f 100644
--- a/src/main/java/ch/hearc/ig/odi/stringcalculatortdd/StringCalculator.java
+++ b/src/main/java/ch/hearc/ig/odi/stringcalculatortdd/StringCalculator.java
@@ -9,80 +9,83 @@
 import org.apache.logging.log4j.Logger;
 
 public class StringCalculator {
-   /* private static final Logger logger = LogManager.getLogger(StringCalculator.class());*/
-    public StringCalculator() {
-    }
-    private static final Logger logger = LogManager.getLogger(StringCalculator.class);
 
+  /* private static final Logger logger = LogManager.getLogger(StringCalculator.class());*/
+  public StringCalculator() {
+  }
 
+  private static final Logger logger = LogManager.getLogger(StringCalculator.class);
 
-    public int add(final String numbers) {
-        //default delimiter
-        String delimiter = ",|\n";
-        String numbersUpdated = numbers;
 
-        //if it begins by '//' then it's a personalize delimiter(s)
-        if (numbers.startsWith("//")) {
-            delimiter = this.extractDelimiter(numbers);
-          logger.info("délimiteur sprécial");
-            //"cut" the beginning of the string so that the personalize delimiter is removed
-            numbersUpdated = numbers.substring(numbers.indexOf("\n") + 1);
-        }
-        return add(numbersUpdated, delimiter);
+  public int add(final String numbers) {
+    //default delimiter
+    String delimiter = ",|\n";
+    String numbersUpdated = numbers;
+
+    //if it begins by '//' then it's a personalize delimiter(s)
+    if (numbers.startsWith("//")) {
+      delimiter = this.extractDelimiter(numbers);
+      logger.info("délimiteur sprécial");
+      //"cut" the beginning of the string so that the personalize delimiter is removed
+      numbersUpdated = numbers.substring(numbers.indexOf("\n") + 1);
     }
+    return add(numbersUpdated, delimiter);
+  }
 
-    private int add(final String numbersWithoutDelimiter, final String delimiter) {
-        int returnValue = 0;
-        List<Integer> negativeNumbers = new ArrayList();
-
-        //a string tab containing the numbers without the delimiter(s) is created
-        String[] numbersArray = numbersWithoutDelimiter.split(delimiter);
-
-      for (String number : numbersArray) {
-        //test if the numbers array is not empty
-        if (!(number.trim().length() == 0)) {
-          Integer numberInt = Integer.parseInt(number);
-          if (numberInt < 0)
-            negativeNumbers.add(numberInt);
-          else if (numberInt <= 1000)
-            returnValue += numberInt;
-          else {
-            logger.warn("Nombre plus grand  que 1000");
-          }
-        }
-      }
+  private int add(final String numbersWithoutDelimiter, final String delimiter) {
+    int returnValue = 0;
+    List<Integer> negativeNumbers = new ArrayList();
 
-        if (negativeNumbers.size() > 0) {
-          logger.fatal("Attention nombre négatif :" +negativeNumbers.toString());
-            throw new RuntimeException("Negative not allowed: " + negativeNumbers.toString());
+    //a string tab containing the numbers without the delimiter(s) is created
+    String[] numbersArray = numbersWithoutDelimiter.split(delimiter);
 
+    for (String number : numbersArray) {
+      //test if the numbers array is not empty
+      if (!(number.trim().length() == 0)) {
+        Integer numberInt = Integer.parseInt(number);
+        if (numberInt < 0) {
+          negativeNumbers.add(numberInt);
+        } else if (numberInt <= 1000) {
+          returnValue += numberInt;
+        } else {
+          logger.warn("Nombre plus grand  que 1000");
         }
+      }
+    }
+
+    if (negativeNumbers.size() > 0) {
+      logger.fatal("Attention nombre négatif :" + negativeNumbers.toString());
+      throw new RuntimeException("Negative not allowed: " + negativeNumbers.toString());
 
-        return returnValue;
     }
 
-    private String extractDelimiter(String numbers) {
-        String[] delimiters;
-        String returnDelimiter;
-        int beginDelimiterIndex = numbers.indexOf("//") + 2;
-        int endDelimiterIndex = numbers.indexOf("\n");
-        //if it begin with '[' and end by ']' there are multiple delimiters
-        if(numbers.charAt(beginDelimiterIndex) == '[' && numbers.charAt(endDelimiterIndex - 1) == ']') {
-            //use an Apache library to get each delimiters between '[' and ']'
-            delimiters = StringUtils.substringsBetween(numbers.substring(beginDelimiterIndex, endDelimiterIndex), "[", "]");
-            returnDelimiter = "";
-            //iterate through the delimiters list and concatenate the delimiter with a '|' between
-            //them so that the split method is OK with the regex
-            for (String element: delimiters) {
-                returnDelimiter += element;
-                returnDelimiter += "|";
-            }
-            returnDelimiter = StringUtils.removeEnd(returnDelimiter, "|");
-        } else {
-            //there is only one delimiter
-            returnDelimiter = numbers.substring(beginDelimiterIndex, endDelimiterIndex);
-        }
+    return returnValue;
+  }
 
-        return returnDelimiter;
+  private String extractDelimiter(String numbers) {
+    String[] delimiters;
+    String returnDelimiter;
+    int beginDelimiterIndex = numbers.indexOf("//") + 2;
+    int endDelimiterIndex = numbers.indexOf("\n");
+    //if it begin with '[' and end by ']' there are multiple delimiters
+    if (numbers.charAt(beginDelimiterIndex) == '['
+        && numbers.charAt(endDelimiterIndex - 1) == ']') {
+      //use an Apache library to get each delimiters between '[' and ']'
+      delimiters = StringUtils
+          .substringsBetween(numbers.substring(beginDelimiterIndex, endDelimiterIndex), "[", "]");
+      returnDelimiter = "";
+      //iterate through the delimiters list and concatenate the delimiter with a '|' between
+      //them so that the split method is OK with the regex
+      for (String element : delimiters) {
+        returnDelimiter += element;
+        returnDelimiter += "|";
+      }
+      returnDelimiter = StringUtils.removeEnd(returnDelimiter, "|");
+    } else {
+      //there is only one delimiter
+      returnDelimiter = numbers.substring(beginDelimiterIndex, endDelimiterIndex);
     }
+
+    return returnDelimiter;
+  }
 }
diff --git a/src/main/resources/log4j2.xml b/src/main/resources/log4j2.xml
index 55fe20c..28ce90c 100644
--- a/src/main/resources/log4j2.xml
+++ b/src/main/resources/log4j2.xml
@@ -10,12 +10,12 @@
     <Console name="console" target="SYSTEM_OUT">
       <LevelRangeFilter minLevel="INFO" maxLevel="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
       <PatternLayout
-        pattern="%highlight{%d{HH:mm:ss} [%t] %-5level %c - %msg%n}{FATAL=red, WARN=yellow, INFO=black}" disableAnsi="false"/>
+        pattern="%highlight{%d{HH:mm:ss} [%t] %-5level %c - %msg%n}" disableAnsi="false"/>
     </Console>
   </Appenders>
   <Loggers>
     <Root level="trace">
-      <AppenderRef ref="Console"/>
+      <AppenderRef ref="console"/>
       <AppenderRef ref="warning"/>
       <AppenderRef ref="fatal"/>
     </Root>