DOC: Fix map table's format
so the HTML doc parser can parse the table correctly
diff --git a/doc/configuration.txt b/doc/configuration.txt
index f6121ee..18da5b9 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -12415,9 +12415,9 @@
-----------+--------------+-----------------+-----------------+---------------
str | end | map_end | map_end_int | map_end_ip
-----------+--------------+-----------------+-----------------+---------------
- | | map_reg | |
- str | reg +-----------------+ map_reg_int | map_reg_ip
- | | map_regm | |
+ str | reg | map_reg | map_reg_int | map_reg_ip
+ -----------+--------------+-----------------+-----------------+---------------
+ str | reg | map_regm | map_reg_int | map_reg_ip
-----------+--------------+-----------------+-----------------+---------------
int | int | map_int | map_int_int | map_int_ip
-----------+--------------+-----------------+-----------------+---------------