0f82da7969da1610cbaa96808797f4458c2d13a6
max
  Tue Sep 5 07:27:44 2023 -0700
switching to LC_ALL in usage help, refs #20910

diff --git src/utils/bedGraphToBigWig/bedGraphToBigWig.c src/utils/bedGraphToBigWig/bedGraphToBigWig.c
index 5452415..0474881 100644
--- src/utils/bedGraphToBigWig/bedGraphToBigWig.c
+++ src/utils/bedGraphToBigWig/bedGraphToBigWig.c
@@ -40,31 +40,32 @@
 {
 errAbort(
   "bedGraphToBigWig v %s - Convert a bedGraph file to bigWig format (bbi version: %d).\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 a two-column file/URL: <chromosome name> <size in bases>\n"
   "and out.bw is the output indexed big wig file.\n"
   "If the assembly <db> is hosted by UCSC, chrom.sizes can be a URL like\n"
   "  http://hgdownload.soe.ucsc.edu/goldenPath/<db>/bigZips/<db>.chrom.sizes\n"
   "or you may use the script fetchChromSizes to download the chrom.sizes file.\n"
   "If not hosted by UCSC, a chrom.sizes file can be generated by running\n"
   "twoBitInfo on the assembly .2bit file.\n"
   "The input bedGraph file must be sorted, use the unix sort command:\n"
-  "  sort -k1,1 -k2,2n unsorted.bedGraph > sorted.bedGraph\n"
+  "  LC_ALL=C sort -k1,1 -k2,2n unsorted.bedGraph > sorted.bedGraph\n"
+  "The LC_ALL=C variable activates case-sensitive sorting.\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"
   "   -sizesIsBb  -- If set, the chrom.sizes file is assumed to be a bigBed file.\n"
   "   -unc - If set, do not use compression."
   , version, bbiCurrentVersion, blockSize, itemsPerSlot
   );
 }
 
 static struct optionSpec options[] = {
    {"blockSize", OPTION_INT},
    {"itemsPerSlot", OPTION_INT},
    {"sizesIsBb", OPTION_BOOLEAN},
    {"unc", OPTION_BOOLEAN},
    {"maxGigs", OPTION_INT},