qemu-img: Sort sub-command names in --help

'amend' and 'create' were not listed alphabetically; hoist them
earlier.  Separate the @end table block to make it easier to
copy-and-paste the addition of future sub-commands.
Signed-off-by: NEric Blake <eblake@redhat.com>

Message-Id: <20170803163353.19558-2-eblake@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

qemu-img-cmds.hx

+HXCOMM Keep the list of subcommands sorted by name.
 HXCOMM Use DEFHEADING() to define headings in both help text and texi
 HXCOMM Text between STEXI and ETEXI are copied to texi version and
 HXCOMM discarded from C version
@@ -9,6 +10,12 @@ STEXI
 @table @option
 ETEXI
 
+DEF("amend", img_amend,
+    "amend [--object objectdef] [--image-opts] [-p] [-q] [-f fmt] [-t cache] -o options filename")
+STEXI
+@item amend [--object @var{objectdef}] [--image-opts] [-p] [-q] [-f @var{fmt}] [-t @var{cache}] -o @var{options} @var{filename}
+ETEXI
+
 DEF("bench", img_bench,
     "bench [-c count] [-d depth] [-f fmt] [--flush-interval=flush_interval] [-n] [--no-drain] [-o offset] [--pattern=pattern] [-q] [-s buffer_size] [-S step_size] [-t cache] [-w] [-U] filename")
 STEXI
@@ -21,12 +28,6 @@ STEXI
 @item check [--object @var{objectdef}] [--image-opts] [-q] [-f @var{fmt}] [--output=@var{ofmt}] [-r [leaks | all]] [-T @var{src_cache}] [-U] @var{filename}
 ETEXI
 
-DEF("create", img_create,
-    "create [-q] [--object objectdef] [-f fmt] [-b backing_file] [-F backing_fmt] [-u] [-o options] filename [size]")
-STEXI
-@item create [--object @var{objectdef}] [-q] [-f @var{fmt}] [-b @var{backing_file}] [-F @var{backing_fmt}] [-u] [-o @var{options}] @var{filename} [@var{size}]
-ETEXI
-
 DEF("commit", img_commit,
     "commit [-q] [--object objectdef] [--image-opts] [-f fmt] [-t cache] [-b base] [-d] [-p] filename")
 STEXI
@@ -45,6 +46,12 @@ STEXI
 @item convert [--object @var{objectdef}] [--image-opts] [--target-image-opts] [-U] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-B @var{backing_file}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename}
 ETEXI
 
+DEF("create", img_create,
+    "create [-q] [--object objectdef] [-f fmt] [-b backing_file] [-F backing_fmt] [-u] [-o options] filename [size]")
+STEXI
+@item create [--object @var{objectdef}] [-q] [-f @var{fmt}] [-b @var{backing_file}] [-F @var{backing_fmt}] [-u] [-o @var{options}] @var{filename} [@var{size}]
+ETEXI
+
 DEF("dd", img_dd,
     "dd [--image-opts] [-U] [-f fmt] [-O output_fmt] [bs=block_size] [count=blocks] [skip=blocks] if=input of=output")
 STEXI
@@ -87,9 +94,6 @@ STEXI
 @item resize [--object @var{objectdef}] [--image-opts] [-q] @var{filename} [+ | -]@var{size}
 ETEXI
 
-DEF("amend", img_amend,
-    "amend [--object objectdef] [--image-opts] [-p] [-q] [-f fmt] [-t cache] -o options filename")
 STEXI
-@item amend [--object @var{objectdef}] [--image-opts] [-p] [-q] [-f @var{fmt}] [-t @var{cache}] -o @var{options} @var{filename}
 @end table
 ETEXI