Refer to delta-transfer algorithm rather than rsync algorithm.

options.c

@@ -353,7 +353,7 @@ void usage(enum logcode F)
 #endif
   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
-  rprintf(F," -W, --whole-file            copy files whole (without rsync algorithm)\n");
+  rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");

rsync.yo

@@ -353,7 +353,7 @@ to the detailed description below for a complete description.  verb(
      --fake-super            store/recover privileged attrs using xattrs
  -S, --sparse                handle sparse files efficiently
  -n, --dry-run               perform a trial run with no changes made
- -W, --whole-file            copy files whole (without rsync algorithm)
+ -W, --whole-file            copy files whole (w/o delta-xfer algorithm)
  -x, --one-file-system       don't cross filesystem boundaries
  -B, --block-size=SIZE       force a fixed checksum block-size
  -e, --rsh=COMMAND           specify the remote shell to use
@@ -1038,7 +1038,7 @@ the "bytes sent", "bytes received", "literal data", and "matched data"
 statistics are too small, and the "speedup" value is equivalent to a run
 where no file transfers are needed.
 
-dit(bf(-W, --whole-file)) With this option the delta transfer algorithm
+dit(bf(-W, --whole-file)) With this option the delta-transfer algorithm
 is not used and the whole file is sent as-is instead.  The transfer may be
 faster if this option is used when the bandwidth between the source and
 destination machines is higher than the bandwidth to disk (especially when the