b02e6901b4ea4ef7eed31e5dbf07a8ed0833e0f4
hiram
  Wed Mar 14 10:50:45 2012 -0700
the sort usage message was incorrect
diff --git src/utils/bedGraphToBigWig/bedGraphToBigWig.c src/utils/bedGraphToBigWig/bedGraphToBigWig.c
index fb37804..67272eb 100644
--- src/utils/bedGraphToBigWig/bedGraphToBigWig.c
+++ src/utils/bedGraphToBigWig/bedGraphToBigWig.c
@@ -23,31 +23,31 @@
 
 void usage()
 /* Explain usage and exit. */
 {
 errAbort(
   "bedGraphToBigWig v %d - Convert a bedGraph program to bigWig.\n"
   "usage:\n"
   "   bedGraphToBigWig in.bedGraph chrom.sizes out.bw\n"
   "where in.bedGraph is a four column file in the format:\n"
   "      <chrom> <start> <end> <value>\n"
   "and chrom.sizes is two column: <chromosome name> <size in bases>\n"
   "and out.bw is the output indexed big wig file.\n"
   "Use the script: fetchChromSizes to obtain the actual chrom.sizes information\n"
   "from UCSC, please do not make up a chrom sizes from your own information.\n"
   "The input bedGraph file must be sorted, use the unix sort command:\n"
-  "  sort -k1,1 -k2,2 unsorted.bedGraph > sorted.bedGraph\n"
+  "  sort -k1,1 -k2,2n unsorted.bedGraph > sorted.bedGraph\n"
   "options:\n"
   "   -blockSize=N - Number of items to bundle in r-tree.  Default %d\n"
   "   -itemsPerSlot=N - Number of data points bundled at lowest level. Default %d\n"
   "   -unc - If set, do not use compression."
   , bbiCurrentVersion, blockSize, itemsPerSlot
   );
 }
 
 static struct optionSpec options[] = {
    {"blockSize", OPTION_INT},
    {"itemsPerSlot", OPTION_INT},
    {"unc", OPTION_BOOLEAN},
    {NULL, 0},
 };