Added getAWordRange and selectAWord methods

These new methods are necessary to select a word along with its right
whitespace, which is a reasonably common scenario.

lib/ace/edit_session.js

@@ -441,6 +441,17 @@ var EditSession = function(text, mode) {
         return new Range(row, start, row, end);
     };
 
+    // Gets the range of a word including its right whitespace
+    this.getAWordRange = function(row, column) {
+        var wordRange = this.getWordRange(row, column);
+        var line = this.getLine(wordRange.end.row);
+
+        while (line.charAt(wordRange.end.column).match(/[ \t]/)) {
+            wordRange.end.column += 1;
+        }
+        return wordRange;
+    };
+
     this.setNewLineMode = function(newLineMode) {
         this.doc.setNewLineMode(newLineMode);
     };

lib/ace/selection.js

@@ -253,6 +253,13 @@ var Selection = function(session) {
         this.setSelectionRange(range);
     };
 
+    // Selects a word including its right whitespace
+    this.selectAWord = function() {
+        var cursor = this.getCursor();
+        var range = this.session.getAWordRange(cursor.row, cursor.column);
+        this.setSelectionRange(range);
+    };
+
     this.selectLine = function() {
         var rowStart = this.selectionLead.row;
         var rowEnd;