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--- a2ps-4.13/contrib/pdiff.in.U	2005-05-05 12:46:05.000000000 +0100
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+++ a2ps-4.13/contrib/pdiff.in	2005-05-05 12:47:34.000000000 +0100
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@@ -182,7 +182,7 @@
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     # We need the total number of lines
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     lines=`wc -l $file1 $file2 | sed -n 3p`
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     lines=`set -- $lines && echo $1`
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-    $diff_prog $diff_options -$lines $file1 $file2	\
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+    $diff_prog $diff_options -U$lines $file1 $file2	\
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        | $a2ps -gEudiff $a2ps_options || exit 1
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     ;;
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 esac
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--- a2ps-4.13/contrib/pdiff.m4.U	2005-05-05 12:47:54.000000000 +0100
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+++ a2ps-4.13/contrib/pdiff.m4	2005-05-05 12:53:10.000000000 +0100
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@@ -100,7 +100,7 @@
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     # We need the total number of lines
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     lines=`wc -l $file1 $file2 | sed -n 3p`
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     lines=`set -- $lines && echo $1`
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-    $diff_prog $diff_options -$lines $file1 $file2	\
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+    $diff_prog $diff_options -U$lines $file1 $file2	\
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        | $a2ps -gEudiff $a2ps_options || exit 1
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     ;;
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 esac