PDFBOX-5660: fix typo, as suggested by Valery Bokov; improve javadoc; closes #281

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1929060 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/color/PDLab.java

@@ -222,7 +222,7 @@ public PDRange getBRange()
     }
 
     /**
-     * This will set the a range for the "a" component.
+     * This will set the range for the "a" component.
      * @param range the new range for the "a" component, 
      * or null if defaults (-100..100) are to be set.
      */
@@ -232,7 +232,7 @@ public void setARange(PDRange range)
     }
 
     /**
-     * This will set the "b" range for this color space.
+     * This will set the range for the "b" component.
      * @param range the new range for the "b" component,
      * or null if defaults (-100..100) are to be set.
      */