Housecleaning: revise identation and comments to meet libpng coding style.
diff --git a/ANNOUNCE b/ANNOUNCE
index bf7c5a0..7f42a7f 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -448,6 +448,10 @@
   Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
 
 version 1.4.0beta59 [May 15, 2009]
+  Reformated sources in libpng style (3-space intentation, comment format)
+  Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
+  Added sections about the git repository and our coding style to the
+    documentation
 
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.