Fixed asciidoc formatting

docs/reference/modules/cluster/disk_allocator.asciidoc

@@ -31,13 +31,13 @@ file or updated dynamically on a live cluster with the
 `cluster.routing.allocation.disk.watermark.flood_stage`::
 +
 --
-    Controls the flood stage watermark. It defaults to 95%, meaning ES enforces
-    a read-only index block (`index.blocks.read_only_allow_delete`) on every
-    index that has one or more shards allocated on the node that has at least
-    one disk exceeding the flood stage.  This is a last resort to prevent nodes
-    from running out of disk space.  The index block must be released manually
-    once there is enough disk space available to allow indexing operations to
-    continue.
+Controls the flood stage watermark. It defaults to 95%, meaning ES enforces
+a read-only index block (`index.blocks.read_only_allow_delete`) on every
+index that has one or more shards allocated on the node that has at least
+one disk exceeding the flood stage.  This is a last resort to prevent nodes
+from running out of disk space.  The index block must be released manually
+once there is enough disk space available to allow indexing operations to
+continue.
 
 NOTE: You can not mix the usage of percentage values and byte values within
 these settings. Either all are set to percentage values, or all are set to byte