Fix various javadoc warnings

src/main/java/org/jacop/constraints/knapsack/Knapsack.java

@@ -327,7 +327,7 @@ private void commonInitialization(int[] profits, int[] weights, IntVar[] quantit
      * It makes sure that no item has a possibility to use more than
      * available capacity.
      * <p>
-     * quantity.max() * weight < remainingCapacity.
+     * quantity.max() * weight &lt; remainingCapacity.
      *
      * @param store             the constraint store responsible for stroing the problem.
      * @param parent            the node from which the restriction

src/main/java/org/jacop/constraints/netflow/simplex/Node.java

@@ -160,7 +160,7 @@ public void markTree(boolean setMark) {
     }
 
     /**
-     * Recomputes the potential & depth values in the subtree rooted at this
+     * Recomputes the potential & depth values in the subtree rooted at this
      * node.
      */
     void computePotentials() {

src/main/java/org/jacop/jasat/core/clauses/DefaultClausesDatabase.java

@@ -535,7 +535,7 @@ public void backjump(int level) {
      * (used for debug) checks if the 2 first literals of the clauses
      * are exactly the set of literals that watch this clause
      *
-     * @param clauseIndex the index of the clause
+     * @param var the variable
      */
     @SuppressWarnings("unused") private String checkWatches4var(int var) {
 

src/main/java/org/jacop/jasat/modules/ActivityModule.java

@@ -181,7 +181,7 @@ public final int getLiteralToAssert() {
     /**
      * gives activity of a (signed) literal
      *
-     * @param literal the literal
+     * @param var the literal
      * @return the activity of this (variable, polarity)
      */
     private final int getLiteralActivity(int var, boolean polarity) {
@@ -196,7 +196,7 @@ private final int getLiteralActivity(int var, boolean polarity) {
     /**
      * code that really performs variable and polarity activity bumping.
      *
-     * @param var the variable
+     * @param literal the variable
      * @return the new activity of the variable
      */
     private final int bumpVar(int literal) {
@@ -266,7 +266,7 @@ private final void rebase(int value) {
 
     /**
      * compares literals according to their activity. This stands for
-     * i > j and not i < j, because we want activities to
+     * i &gt; j and not i &lt; j, because we want activities to
      * be sorted in decreasing order
      *
      * @author simon

src/main/java/org/jacop/util/SimpleHashSet.java

@@ -112,7 +112,7 @@ public boolean contains(E checkedElement) {
 
     /**
      * The maximum capacity, used if a higher value is implicitly specified by
-     * either of the constructors with arguments. MUST be a power of two <= 1<<30.
+     * either of the constructors with arguments. MUST be a power of two &le; 1&lt;&lt;30.
      */
     static final int MAXIMUM_CAPACITY = 1 << 30;