qapi: Fix unintended definition lists in documentation

rST parses something like

    first line
        second line

as a definition list item, where "first line" is the term being
defined by "second line".

This bites us in a couple of places.  Here's one:

    # @bps_max: total throughput limit during bursts,
    #                     in bytes (Since 1.7)

scripts/qapi/parser.py parses this into an "argument section" with
name "bps_max" and text

    total throughput limit during bursts,
	      in bytes (Since 1.7)

docs/sphinx/qapidoc.py duly passes the text to the rST parser, which
parses it as another definition list.  Comes out as nested
definitions: term "bps_max: int (optional)" defined as term "total
throughput limit during bursts," defined as "in bytes (Since 1.7)".

rST truly is the Perl of ASCII-based markups.

Fix by deleting the extra indentation.

Fixes: 26ec4e53f2bf (qapi: Fix indent level on doc comments in json files)
Fixes: c0ac533b6f97 (qapi: Stop using whitespace for alignment in comments)
Fixes: 81ad2964e938 (net/vmnet: add vmnet backends to qapi/net)
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20230425064223.820979-11-armbru@redhat.com>
diff --git a/qapi/block-core.json b/qapi/block-core.json
index a5a5007..2382772 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -488,41 +488,41 @@
 #
 # @image: the info of image used (since: 1.6)
 #
-# @bps_max: total throughput limit during bursts,
-#                     in bytes (Since 1.7)
+# @bps_max: total throughput limit during bursts, in bytes
+#           (Since 1.7)
 #
-# @bps_rd_max: read throughput limit during bursts,
-#                        in bytes (Since 1.7)
+# @bps_rd_max: read throughput limit during bursts, in bytes
+#              (Since 1.7)
 #
-# @bps_wr_max: write throughput limit during bursts,
-#                        in bytes (Since 1.7)
+# @bps_wr_max: write throughput limit during bursts, in bytes
+#              (Since 1.7)
 #
-# @iops_max: total I/O operations per second during bursts,
-#                      in bytes (Since 1.7)
+# @iops_max: total I/O operations per second during bursts, in bytes
+#            (Since 1.7)
 #
-# @iops_rd_max: read I/O operations per second during bursts,
-#                         in bytes (Since 1.7)
+# @iops_rd_max: read I/O operations per second during bursts, in bytes
+#               (Since 1.7)
 #
-# @iops_wr_max: write I/O operations per second during bursts,
-#                         in bytes (Since 1.7)
+# @iops_wr_max: write I/O operations per second during bursts, in
+#               bytes (Since 1.7)
 #
-# @bps_max_length: maximum length of the @bps_max burst
-#                            period, in seconds. (Since 2.6)
+# @bps_max_length: maximum length of the @bps_max burst period, in
+#                  seconds. (Since 2.6)
 #
-# @bps_rd_max_length: maximum length of the @bps_rd_max
-#                               burst period, in seconds. (Since 2.6)
+# @bps_rd_max_length: maximum length of the @bps_rd_max burst period,
+#                     in seconds. (Since 2.6)
 #
-# @bps_wr_max_length: maximum length of the @bps_wr_max
-#                               burst period, in seconds. (Since 2.6)
+# @bps_wr_max_length: maximum length of the @bps_wr_max burst period,
+#                     in seconds. (Since 2.6)
 #
-# @iops_max_length: maximum length of the @iops burst
-#                             period, in seconds. (Since 2.6)
+# @iops_max_length: maximum length of the @iops burst period, in
+#                   seconds. (Since 2.6)
 #
-# @iops_rd_max_length: maximum length of the @iops_rd_max
-#                                burst period, in seconds. (Since 2.6)
+# @iops_rd_max_length: maximum length of the @iops_rd_max burst
+#                      period, in seconds. (Since 2.6)
 #
-# @iops_wr_max_length: maximum length of the @iops_wr_max
-#                                burst period, in seconds. (Since 2.6)
+# @iops_wr_max_length: maximum length of the @iops_wr_max burst
+#                      period, in seconds. (Since 2.6)
 #
 # @iops_size: an I/O size in bytes (Since 1.7)
 #
@@ -948,7 +948,7 @@
 #                           by the device (Since 4.2)
 #
 # @invalid_rd_operations: The number of invalid read operations
-#                          performed by the device (Since 2.5)
+#                         performed by the device (Since 2.5)
 #
 # @invalid_wr_operations: The number of invalid write operations
 #                         performed by the device (Since 2.5)
@@ -3735,7 +3735,7 @@
 # Driver specific block device options for Quorum
 #
 # @blkverify: true if the driver must print content mismatch
-#                  set to false by default
+#             set to false by default
 #
 # @children: the children block devices to use
 #