Added missing '@since 2.4' lines based on jardiff report

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@618884 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/lang/CharSet.java

@@ -152,6 +152,7 @@ public class CharSet implements Serializable {
      *
      * @param setStrs  Strings to merge into the initial set, may be null
      * @return a CharSet instance
+     * @since 2.4
      */
     public static CharSet getInstance(String[] setStrs) {
         if (setStrs == null) {

src/java/org/apache/commons/lang/WordUtils.java

@@ -600,6 +600,7 @@ public class WordUtils {
      *                    This is appended ONLY if the string was indeed abbreviated.
      *                    The append does not count towards the lower or upper limits.
      * @return the abbreviated String.
+     * @since 2.4
      */
     public static String abbreviate(String str, int lower, int upper, String appendToEnd) {
         // initial parameter checks

src/java/org/apache/commons/lang/text/StrMatcher.java

@@ -261,7 +261,7 @@ public abstract class StrMatcher {
      * @param buffer  the text content to match against, do not change
      * @param pos  the starting position for the match, valid for buffer
      * @return the number of matching characters, zero for no match
-     * @since Commons Lang 2.4
+     * @since 2.4
      */
     public int isMatch(char[] buffer, int pos) {
         return isMatch(buffer, pos, 0, buffer.length);