[gspell] docs: add page IDs

[Sébastien Wilmet <swilmet src gnome org>]

commit 571233c1a5c01929ca5b2bdf0d06fab188341cc5
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Jun 16 13:08:54 2017 +0200

    docs: add page IDs
    
    To have more future-proof links, instead of "pt01.html", "pt02.html"
    etc.

 docs/reference/gspell-docs.xml.in |   12 ++++++------
 docs/reference/intro.xml.in       |    2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/docs/reference/gspell-docs.xml.in b/docs/reference/gspell-docs.xml.in
index 74ab61a..432f18f 100644
--- a/docs/reference/gspell-docs.xml.in
+++ b/docs/reference/gspell-docs.xml.in
@@ -14,36 +14,36 @@
 
   <xi:include href="intro.xml"/>
 
-  <part>
+  <part id="api-reference">
     <title>API reference</title>
 
-    <chapter>
+    <chapter id="core-classes">
       <title>Core Classes</title>
       <xi:include href="xml/checker.xml"/>
       <xi:include href="xml/language.xml"/>
     </chapter>
 
-    <chapter>
+    <chapter id="language-choosers">
       <title>Language Choosers</title>
       <xi:include href="xml/language-chooser.xml"/>
       <xi:include href="xml/language-chooser-button.xml"/>
       <xi:include href="xml/language-chooser-dialog.xml"/>
     </chapter>
 
-    <chapter>
+    <chapter id="spell-checker-dialog">
       <title>Spell Checker Dialog</title>
       <xi:include href="xml/checker-dialog.xml"/>
       <xi:include href="xml/navigator.xml"/>
     </chapter>
 
-    <chapter>
+    <chapter id="GtkTextView-support">
       <title>GtkTextView Support</title>
       <xi:include href="xml/text-buffer.xml"/>
       <xi:include href="xml/text-view.xml"/>
       <xi:include href="xml/navigator-text-view.xml"/>
     </chapter>
 
-    <chapter>
+    <chapter id="GtkEntry-support">
       <title>GtkEntry Support</title>
       <xi:include href="xml/entry-buffer.xml"/>
       <xi:include href="xml/entry.xml"/>
diff --git a/docs/reference/intro.xml.in b/docs/reference/intro.xml.in
index 74b3ffa..acd352d 100644
--- a/docs/reference/intro.xml.in
+++ b/docs/reference/intro.xml.in
@@ -7,7 +7,7 @@
  %gtkdocentities;
 ]>
 
-<part>
+<part id="intro">
   <title>Introduction</title>
 
   <para>