[gtk-doc] xsl: fix some typo and clarify comment

[Stefan Sauer <stefkost src gnome org>]

commit 4c147cf11181f7d01a9af29e89ec981ac7dfe140
Author: Stefan Sauer <ensonic users sf net>
Date:   Sat Dec 9 22:30:50 2017 +0100

    xsl: fix some typo and clarify comment
    
    Try the various modes and update the comment.

 gtk-doc.xsl |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gtk-doc.xsl b/gtk-doc.xsl
index 7da5532..3471e6c 100644
--- a/gtk-doc.xsl
+++ b/gtk-doc.xsl
@@ -5,8 +5,9 @@
                 version="1.0">
 
   <!-- import the chunked XSL stylesheet -->
-  <!-- http://www.sagehill.net/docbookxsl/Chunking.html says we should use
-       "chunkfast.xsl", but I can see a difference -->
+  <!-- http://www.sagehill.net/docbookxsl/Chunking.html#FastChunking says we should use
+       "chunkfast.xsl", but I can't see a difference. Also it is not clear wheter
+       one should still set "chunk.fast". Again, no meassuable difference. -->
   <xsl:import href="http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl"/>
   <xsl:include href="devhelp2.xsl"/>
   <xsl:include href="version-greater-or-equal.xsl"/>