small javadoc fixes

git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@2431 f5eafffb-2e1d-0410-98e4-8ec43c5233c4

com.ibm.wala.core/src/com/ibm/wala/demandpa/flowgraph/DemandFlowGraph.java

@@ -171,6 +171,11 @@ public abstract class DemandFlowGraph extends FlowLabelGraph {
     return cgNodesVisited.contains(cg.getNumber(node));
   }
 
+  /**
+   * 
+   * @param pk
+   * @return <code>true</code> iff <code>pk</code> is a formal parameter
+   */
   public boolean isParam(LocalPointerKey pk) {
     return params.get(pk) != null;
   }

com.ibm.wala.core/src/com/ibm/wala/util/graph/labeled/LabeledEdgeManager.java

@@ -56,7 +56,7 @@ import org.w3c.dom.Node;
 import com.ibm.wala.util.graph.EdgeManager;
 
 /**
- * On object which tracks labeled edges in a graph.
+ * An object which tracks labeled edges in a graph.
  * 
  * @author Manu Sridharan
  *