doc: group dd conv= options that are actually flags

* src/dd.c (usage): Move 'sync' up with other data transformation
options.  Having it alongside 'fsync' and 'fdatasync' is
particularly confusing.  Also the double line description of
the 'sync' option, serves as a visual break from the "flag"
type options that follow.
* doc/coreutils.texi (dd invocation):  Apply the same grouping
as above, by splitting the "conv=" table in two.

1 files changed, 5 insertions, 7 deletions

diff --git a/src/dd.c b/src/dd.c
index fd468a647..a2b4d209f 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -499,18 +499,16 @@ Each CONV symbol may be:\n\
   block     pad newline-terminated records with spaces to cbs-size\n\
   unblock   replace trailing spaces in cbs-size records with newline\n\
   lcase     change upper case to lower case\n\
-"), stdout);
-      fputs (_("\
-  nocreat   do not create the output file\n\
-  excl      fail if the output file already exists\n\
-  notrunc   do not truncate the output file\n\
   ucase     change lower case to upper case\n\
   swab      swap every pair of input bytes\n\
+  sync      pad every input block with NULs to ibs-size; when used\n\
+            with block or unblock, pad with spaces rather than NULs\n\
 "), stdout);
       fputs (_("\
+  excl      fail if the output file already exists\n\
+  nocreat   do not create the output file\n\
+  notrunc   do not truncate the output file\n\
   noerror   continue after read errors\n\
-  sync      pad every input block with NULs to ibs-size; when used\n\
-            with block or unblock, pad with spaces rather than NULs\n\
   fdatasync  physically write output file data before finishing\n\
   fsync     likewise, but also write metadata\n\
 "), stdout);