doc: Replace "NOTE" with proper markup

diff --git a/doc/src/sgml/pgfreespacemap.sgml b/doc/src/sgml/pgfreespacemap.sgml
index 51f772a397a0436830bcae861063a716ac49189f..4519a66a8d277f000f7ea6fbc9a2f13275c196a5 100644 (file)
--- a/doc/src/sgml/pgfreespacemap.sgml
+++ b/doc/src/sgml/pgfreespacemap.sgml
@@ -65,10 +65,12 @@
    whether a page is full or empty.
   
 
-  
-   NOTE: The interface was changed in version 8.4, to reflect the new FSM
-   implementation introduced in the same version.
-  
+  
+   
+    The interface was changed in version 8.4, to reflect the new FSM
+    implementation introduced in the same version.
+   
+