adapt description, the algorithm does not define the escape character

Change-Id: I3b2493a02d16604aead5d416fc90cceecdfddc38

offapi/com/sun/star/util/SearchAlgorithms2.idl

@@ -13,7 +13,7 @@
 module com { module sun { module star { module util {
 
 /** Constants that define the search algorithm to be used with
-    com::sun::star::util::SearchOptions2
+    com::sun::star::util::SearchOptions2::SearchAlgorithms2
 
     @since LibreOffice 5.2
  */
@@ -28,7 +28,10 @@ published constants SearchAlgorithms2
     /// Weighted Levenshtein Distance
     const short APPROXIMATE = 3;
 
-    /// Wildcards '*' and '?' and escape character '~'
+    /** Wildcards '*' and '?'
+        An escape character is defined by setting
+        com::sun::star::util::SearchOptions2::WildcardEscapeCharacter
+     */
     const short WILDCARD = 4;
 };