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--- shadow-4.0.18.1/src/usermod.c.appendOption	2007-01-14 14:04:29.000000000 +0100
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+++ shadow-4.0.18.1/src/usermod.c	2007-01-14 14:05:04.000000000 +0100
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@@ -905,7 +905,7 @@
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 		 */
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 		int c;
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 		static struct option long_options[] = {
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-			{"append", required_argument, NULL, 'a'},
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+			{"append", no_argument, NULL, 'a'},
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 			{"comment", required_argument, NULL, 'c'},
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 			{"home", required_argument, NULL, 'd'},
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 			{"expiredate", required_argument, NULL, 'e'},