Optimized png files.
diff --git a/expat/doc/expat.png b/expat/doc/expat.png
index 97e45cd..3d88eac 100644
--- a/expat/doc/expat.png
+++ b/expat/doc/expat.png
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diff --git a/expat/doc/valid-xhtml10.png b/expat/doc/valid-xhtml10.png
index dc9003d..2f755c6 100644
--- a/expat/doc/valid-xhtml10.png
+++ b/expat/doc/valid-xhtml10.png
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