Nuked almost all trailing white space.

We better do this once and for all instead of cluttering all future
commits with diffs of trailing white spaces.  In the majority of cases
blank or single lines are affected and thus this change won't disturb
a git blame too much.  For future commits the pre-commit scripts
checks that this won't happen again.

scripts/ChangeLog

@@ -36,4 +36,3 @@
  This file is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-

scripts/potomo

@@ -43,18 +43,18 @@ if [ "$outfile" -nt "$infile" ]; then
   echo "potomo: '$outfile' is newer than source - keeping" 2>&1
   exit 0
 fi
-  
+
 # Note that we could use the newer msgconv.  However this tool was not
 # widely available back in 2008.
 
 fromset=`sed -n '/^"Content-Type:/ s/.*charset=\([a-zA-Z0-9_-]*\).*/\1/p' \
          "$infile"`
 
-case "$fromset" in 
-    utf8|utf-8|UTF8|UTF-8) 
-        echo "potomo: '$infile' keeping $fromset" >&2 
+case "$fromset" in
+    utf8|utf-8|UTF8|UTF-8)
+        echo "potomo: '$infile' keeping $fromset" >&2
         msgfmt --output-file="$outfile" "$infile"
-        ;;   
+        ;;
     *)
         echo "potomo: '$infile' converting from $fromset to utf-8" >&2
         iconv --silent --from-code=$fromset --to-code=utf-8 < "$infile" |\