Remove col-spanning cells in logging docs.
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst
index d563534..253eb77 100644
--- a/Doc/library/logging.rst
+++ b/Doc/library/logging.rst
@@ -2074,8 +2074,8 @@
       The symbolic ``LOG_`` values are defined in :class:`SysLogHandler` and
       mirror the values defined in the ``sys/syslog.h`` header file.
 
-      +------------------------------------------+
-      | Priorities                               |
+      **Priorities**
+
       +--------------------------+---------------+
       | Name (string)            | Symbolic value|
       +==========================+===============+
@@ -2096,8 +2096,8 @@
       | ``warn`` or ``warning``  | LOG_WARNING   |
       +--------------------------+---------------+
 
-      +-------------------------------+
-      | Facilities                    |
+      **Facilities**
+
       +---------------+---------------+
       | Name (string) | Symbolic value|
       +===============+===============+