Fix comment typo; add further comments

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1458394 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/fileupload/util/mime/MimeUtility.java b/src/main/java/org/apache/commons/fileupload/util/mime/MimeUtility.java
index f6f6231..e92f719 100644
--- a/src/main/java/org/apache/commons/fileupload/util/mime/MimeUtility.java
+++ b/src/main/java/org/apache/commons/fileupload/util/mime/MimeUtility.java
@@ -117,12 +117,12 @@
             char ch = text.charAt(offset);
 
             // is this a whitespace character?
-            if (LINEAR_WHITESPACE.indexOf(ch) != -1) {
+            if (LINEAR_WHITESPACE.indexOf(ch) != -1) { // whitespace found
                 startWhiteSpace = offset;
                 while (offset < endOffset) {
                     // step over the white space characters.
                     ch = text.charAt(offset);
-                    if (LINEAR_WHITESPACE.indexOf(ch) != -1) {
+                    if (LINEAR_WHITESPACE.indexOf(ch) != -1) { // whitespace found
                         offset++;
                     } else {
                         // record the location of the first non lwsp and drop down to process the
@@ -136,9 +136,9 @@
                 int wordStart = offset;
 
                 while (offset < endOffset) {
-                    // step over the white space characters.
+                    // step over the non white space characters.
                     ch = text.charAt(offset);
-                    if (LINEAR_WHITESPACE.indexOf(ch) == -1) {
+                    if (LINEAR_WHITESPACE.indexOf(ch) == -1) { // not white space
                         offset++;
                     } else {
                         break;