diff --git a/whitespacecleanup.sh b/whitespacecleanup.sh
--- a/whitespacecleanup.sh
+++ b/whitespacecleanup.sh
@@ -2,9 +2,11 @@
 
 # Enforce some consistency in whitespace - just to avoid spurious whitespaces changes
 
-files=`hg loc '*.py' '*.html' '*.css' '*.rst' '*.txt' '*.js' | egrep -v '/lockfiles.py|LICENSE-MERGELY.html|/codemirror/|/fontello/|(graph|mergely|native.history|select2/select2|yui.flot)\.js$'`
+files=`hg loc '*.py' '*.html' '*.css' '*.rst' '*.txt' '*.js' | egrep -v '/lockfiles.py|LICENSE-MERGELY.html|/codemirror/|/fontello/|(graph|mergely|native.history|select2/select2|yui.flot|yui.2.9)\.js$'`
 sed -i "s,`printf '\t'`,    ,g" $files
 sed -i "s,  *$,,g" $files
+# add trailing newline if missing:
+sed -i '$a\' $files
 
 sed -i 's,\([^ /]\){,\1 {,g' `hg loc '*.css'`
 sed -i 's|^\([^ /].*,\)\([^ ]\)|\1 \2|g' `hg loc '*.css'`