affixed ROOT locale, should fix #151

src/main/java/carpet/script/value/LazyListValue.java

@@ -3,9 +3,9 @@ package carpet.script.value;
 import carpet.script.exception.InternalExpressionException;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 
 public abstract class LazyListValue extends AbstractListValue implements Iterator<Value>
 {
@@ -48,7 +48,7 @@ public abstract class LazyListValue extends AbstractListValue implements Iterato
             @Override
             public String getString()
             {
-                return String.format("[%d, %d, ..., %d]",start, start+stepp, limit);
+                return String.format(Locale.ROOT, "[%d, %d, ..., %d]",start, start+stepp, limit);
             }
         };
     }

src/main/java/carpet/script/value/NumericValue.java

@@ -4,6 +4,7 @@ import carpet.script.exception.InternalExpressionException;
 import org.apache.commons.lang3.StringUtils;
 
 import java.math.BigDecimal;
+import java.util.Locale;
 
 import static java.lang.Math.abs;
 
@@ -42,7 +43,7 @@ public class NumericValue extends Value
         }
         else
         {
-            return String.format("%.1f..", getDouble());
+            return String.format(Locale.ROOT, "%.1f..", getDouble());
         }
     }