devel-docs: fix and update the libgimpthumb docs

devel-docs/libgimpthumb/.gitignore

@@ -1,16 +1,16 @@
 /Makefile
 /Makefile.in
 /deprecated
-/libgimpthumb.args
-/libgimpthumb.hierarchy
-/libgimpthumb.interfaces
-/libgimpthumb.prerequisites
-/libgimpthumb.signals
-/libgimpthumb-decl.txt
-/libgimpthumb-decl-list.txt
-/libgimpthumb-unused.txt
-/libgimpthumb-undeclared.txt
-/libgimpthumb-undocumented.txt
+/libgimpthumb3.args
+/libgimpthumb3.hierarchy
+/libgimpthumb3.interfaces
+/libgimpthumb3.prerequisites
+/libgimpthumb3.signals
+/libgimpthumb3-decl.txt
+/libgimpthumb3-decl-list.txt
+/libgimpthumb3-unused.txt
+/libgimpthumb3-undeclared.txt
+/libgimpthumb3-undocumented.txt
 /html
 /tmpl
 /xml

devel-docs/libgimpthumb/Makefile.am

@@ -1,13 +1,13 @@
 ## Process this file with automake to produce Makefile.in
 
 # The name of the module.
-DOC_MODULE = libgimpthumb
+DOC_MODULE = libgimpthumb3
 
 # The top-level SGML file.
 DOC_MAIN_SGML_FILE = $(DOC_MODULE)-docs.sgml
 
 # The directory containing the source code.
-DOC_SOURCE_DIR = $(top_srcdir)/$(DOC_MODULE)
+DOC_SOURCE_DIR = $(top_srcdir)/libgimpthumb
 
 # Extra options to pass to gtkdoc-scangobj
 SCANGOBJ_OPTIONS =

devel-docs/libgimpthumb/libgimpthumb3-sections.txt

@@ -16,9 +16,9 @@ gimp_thumbnail_save_failure
 gimp_thumbnail_delete_failure
 gimp_thumbnail_delete_others
 gimp_thumbnail_has_failed
-
 <SUBSECTION Standard>
 GimpThumbnailClass
+GimpThumbnailPrivate
 GIMP_THUMBNAIL
 GIMP_IS_THUMBNAIL
 GIMP_TYPE_THUMBNAIL