removed unnecessary string concatenation

diff --git a/compatibility-client/src/main/java/com/vaadin/v7/client/widgets/Grid.java b/compatibility-client/src/main/java/com/vaadin/v7/client/widgets/Grid.java
index 055fcaef208099da3e760b11c2d8ea5ef634a3e1..3ef3adcc210c88098bb06a745554c6d5213e4d9d 100755 (executable)
--- a/compatibility-client/src/main/java/com/vaadin/v7/client/widgets/Grid.java
+++ b/compatibility-client/src/main/java/com/vaadin/v7/client/widgets/Grid.java
@@ -6463,7 +6463,7 @@ public class Grid<T> extends ResizeComposite implements HasSelectionHandlers<T>,
     private void checkColumnIsValidToAdd(Column<?, T> column, int index) {
         if (column == this.selectionColumn) {
             throw new IllegalArgumentException(
-                "The selection column many " + "not be added manually");
+                "The selection column may not be added manually");
         } else if (this.selectionColumn != null && index == 0) {
             throw new IllegalStateException("A column cannot be inserted "
                 + "before the selection column");