[gtk-doc] db2html: fix short name for part

[Stefan Sauer <stefkost src gnome org>]

commit 1c0e33018410355129edac1434b4a3acaa82bf40
Author: Stefan Sauer <ensonic users sf net>
Date:   Thu Feb 22 09:42:45 2018 +0100

    db2html: fix short name for part

 tools/db2html.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tools/db2html.py b/tools/db2html.py
index de158a9..a1506cc 100644
--- a/tools/db2html.py
+++ b/tools/db2html.py
@@ -110,7 +110,7 @@ CHUNK_PARAMS = {
     'book': ChunkParams('bk'),
     'chapter': ChunkParams('ch', 'book'),
     'index': ChunkParams('ix', 'book'),
-    'part': ChunkParams('part', 'book'),
+    'part': ChunkParams('pt', 'book'),
     'sect1': ChunkParams('s', 'chapter'),
     'section': ChunkParams('s', 'chapter'),
 }