str(1): adds reference to perror(3) in include
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@ -19,7 +19,7 @@
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#include <ctype.h>
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#include <stddef.h> /* NULL */
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#include <stdio.h> /* fprintf(3) */
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#include <stdio.h> /* fprintf(3), perror(2) */
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#include <stdlib.h> /* size_t, EXIT_FAILURE */
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#include <string.h> /* strcmp(3) */
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#include <sysexits.h> /* EX_OSERR, EX_USAGE */
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