XSLT/param@expression used as string instead of as expression as documented

There were 2 options to fix the bugreport :
- change the code
- change the documentation
I hope that the option to change the documentation is OK.
Thanks for the bug report.
PR: 21525


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@274957 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/style.html

@@ -186,8 +186,8 @@ element is used to perform Entity and URI resolution.</p>
   </tr>
   <tr>
     <td valign="top">expression</td>
-    <td valign="top">XSL expression to be placed into the param. To pass a text
-      value into the style sheet it needs to be escaped using single quotes.</td>
+    <td valign="top">Text value to be placed into the param.<br/>
+    Was originally intended to be an XSL expression.
     <td align="center" valign="top">Yes</td>
   </tr>
 </table>

src/main/org/apache/tools/ant/taskdefs/XSLTProcess.java

@@ -609,7 +609,7 @@ public class XSLTProcess extends MatchingTask implements XSLTLogger {
         /** The parameter name */
         private String name = null;
 
-        /** The parameter's XSL expression */
+        /** The parameter's value */
         private String expression = null;
 
         /**
@@ -622,10 +622,9 @@ public class XSLTProcess extends MatchingTask implements XSLTLogger {
         }
 
         /**
-         * The XSL expression for the parameter value
-         *
-         * @param expression the XSL expression representing the
-         *   parameter's value.
+         * The parameter value
+         * NOTE : was intended to be an XSL expression.
+         * @param expression the parameter's value.
          */
         public void setExpression(String expression) {
             this.expression = expression;
@@ -645,10 +644,10 @@ public class XSLTProcess extends MatchingTask implements XSLTLogger {
         }
 
         /**
-         * Get the parameter expression
+         * Get the parameter's value
          *
-         * @return the parameter expression
-         * @exception BuildException if the expression is not set.
+         * @return the parameter value
+         * @exception BuildException if the value is not set.
          */
         public String getExpression() throws BuildException {
             if (expression == null) {