delta.c: fix option '-t'
Both the help and man page claims that it accepts -t with an argument so let's do that.
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@ -352,7 +352,7 @@ static int parse_argv(int argc, char *argv[]) {
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assert(argc >= 1);
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assert(argc >= 1);
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assert(argv);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
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while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0) {
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switch (c) {
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switch (c) {
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