DOC: fix fetching samples syntax

The syntax used to document fetching samples with optional arguments was not
always valid. This commit fixes this issue in order to allow an easier parsing
of the documentation.

doc/configuration.txt

@@ -9741,7 +9741,7 @@ fe_id : integer
   backends to check from which backend it was called, or to stick all users
   coming via a same frontend to the same server.
 
-sc_bytes_in_rate(<ctr>,[<table>]) : integer
+sc_bytes_in_rate(<ctr>[,<table>]) : integer
 sc0_bytes_in_rate([<table>]) : integer
 sc1_bytes_in_rate([<table>]) : integer
 sc2_bytes_in_rate([<table>]) : integer
@@ -9749,7 +9749,7 @@ sc2_bytes_in_rate([<table>]) : integer
   counters, measured in amount of bytes over the period configured in the
   table. See also src_bytes_in_rate.
 
-sc_bytes_out_rate(<ctr>,[<table>]) : integer
+sc_bytes_out_rate(<ctr>[,<table>]) : integer
 sc0_bytes_out_rate([<table>]) : integer
 sc1_bytes_out_rate([<table>]) : integer
 sc2_bytes_out_rate([<table>]) : integer
@@ -9757,7 +9757,7 @@ sc2_bytes_out_rate([<table>]) : integer
   counters, measured in amount of bytes over the period configured in the
   table. See also src_bytes_out_rate.
 
-sc_clr_gpc0(<ctr>,[<table>]) : integer
+sc_clr_gpc0(<ctr>[,<table>]) : integer
 sc0_clr_gpc0([<table>]) : integer
 sc1_clr_gpc0([<table>]) : integer
 sc2_clr_gpc0([<table>]) : integer
@@ -9775,14 +9775,14 @@ sc2_clr_gpc0([<table>]) : integer
         tcp-request connection accept if !abuse save
         tcp-request connection reject if abuse kill
 
-sc_conn_cnt(<ctr>,[<table>]) : integer
+sc_conn_cnt(<ctr>[,<table>]) : integer
 sc0_conn_cnt([<table>]) : integer
 sc1_conn_cnt([<table>]) : integer
 sc2_conn_cnt([<table>]) : integer
   Returns the cumulated number of incoming connections from currently tracked
   counters. See also src_conn_cnt.
 
-sc_conn_cur(<ctr>,[<table>]) : integer
+sc_conn_cur(<ctr>[,<table>]) : integer
 sc0_conn_cur([<table>]) : integer
 sc1_conn_cur([<table>]) : integer
 sc2_conn_cur([<table>]) : integer
@@ -9790,7 +9790,7 @@ sc2_conn_cur([<table>]) : integer
   tracked counters. This number is automatically incremented when tracking
   begins and decremented when tracking stops. See also src_conn_cur.
 
-sc_conn_rate(<ctr>,[<table>]) : integer
+sc_conn_rate(<ctr>[,<table>]) : integer
 sc0_conn_rate([<table>]) : integer
 sc1_conn_rate([<table>]) : integer
 sc2_conn_rate([<table>]) : integer
@@ -9798,14 +9798,14 @@ sc2_conn_rate([<table>]) : integer
   measured in amount of connections over the period configured in the table.
   See also src_conn_rate.
 
-sc_get_gpc0(<ctr>,[<table>]) : integer
+sc_get_gpc0(<ctr>[,<table>]) : integer
 sc0_get_gpc0([<table>]) : integer
 sc1_get_gpc0([<table>]) : integer
 sc2_get_gpc0([<table>]) : integer
   Returns the value of the first General Purpose Counter associated to the
   currently tracked counters. See also src_get_gpc0 and sc/sc0/sc1/sc2_inc_gpc0.
 
-sc_gpc0_rate(<ctr>,[<table>]) : integer
+sc_gpc0_rate(<ctr>[,<table>]) : integer
 sc0_gpc0_rate([<table>]) : integer
 sc1_gpc0_rate([<table>]) : integer
 sc2_gpc0_rate([<table>]) : integer
@@ -9816,7 +9816,7 @@ sc2_gpc0_rate([<table>]) : integer
   that the "gpc0_rate" counter must be stored in the stick-table for a value to
   be returned, as "gpc0" only holds the event count.
 
-sc_http_err_cnt(<ctr>,[<table>]) : integer
+sc_http_err_cnt(<ctr>[,<table>]) : integer
 sc0_http_err_cnt([<table>]) : integer
 sc1_http_err_cnt([<table>]) : integer
 sc2_http_err_cnt([<table>]) : integer
@@ -9824,7 +9824,7 @@ sc2_http_err_cnt([<table>]) : integer
   counters. This includes the both request errors and 4xx error responses.
   See also src_http_err_cnt.
 
-sc_http_err_rate(<ctr>,[<table>]) : integer
+sc_http_err_rate(<ctr>[,<table>]) : integer
 sc0_http_err_rate([<table>]) : integer
 sc1_http_err_rate([<table>]) : integer
 sc2_http_err_rate([<table>]) : integer
@@ -9833,7 +9833,7 @@ sc2_http_err_rate([<table>]) : integer
   includes the both request errors and 4xx error responses. See also
   src_http_err_rate.
 
-sc_http_req_cnt(<ctr>,[<table>]) : integer
+sc_http_req_cnt(<ctr>[,<table>]) : integer
 sc0_http_req_cnt([<table>]) : integer
 sc1_http_req_cnt([<table>]) : integer
 sc2_http_req_cnt([<table>]) : integer
@@ -9841,7 +9841,7 @@ sc2_http_req_cnt([<table>]) : integer
   counters. This includes every started request, valid or not. See also
   src_http_req_cnt.
 
-sc_http_req_rate(<ctr>,[<table>]) : integer
+sc_http_req_rate(<ctr>[,<table>]) : integer
 sc0_http_req_rate([<table>]) : integer
 sc1_http_req_rate([<table>]) : integer
 sc2_http_req_rate([<table>]) : integer
@@ -9850,7 +9850,7 @@ sc2_http_req_rate([<table>]) : integer
   the table. This includes every started request, valid or not. See also
   src_http_req_rate.
 
-sc_inc_gpc0(<ctr>,[<table>]) : integer
+sc_inc_gpc0(<ctr>[,<table>]) : integer
 sc0_inc_gpc0([<table>]) : integer
 sc1_inc_gpc0([<table>]) : integer
 sc2_inc_gpc0([<table>]) : integer
@@ -9864,7 +9864,7 @@ sc2_inc_gpc0([<table>]) : integer
         acl kill  sc0_inc_gpc0 gt 0
         tcp-request connection reject if abuse kill
 
-sc_kbytes_in(<ctr>,[<table>]) : integer
+sc_kbytes_in(<ctr>[,<table>]) : integer
 sc0_kbytes_in([<table>]) : integer
 sc1_kbytes_in([<table>]) : integer
 sc2_kbytes_in([<table>]) : integer
@@ -9873,7 +9873,7 @@ sc2_kbytes_in([<table>]) : integer
   test is currently performed on 32-bit integers, which limits values to 4
   terabytes. See also src_kbytes_in.
 
-sc_kbytes_out(<ctr>,[<table>]) : integer
+sc_kbytes_out(<ctr>[,<table>]) : integer
 sc0_kbytes_out([<table>]) : integer
 sc1_kbytes_out([<table>]) : integer
 sc2_kbytes_out([<table>]) : integer
@@ -9882,7 +9882,7 @@ sc2_kbytes_out([<table>]) : integer
   test is currently performed on 32-bit integers, which limits values to 4
   terabytes. See also src_kbytes_out.
 
-sc_sess_cnt(<ctr>,[<table>]) : integer
+sc_sess_cnt(<ctr>[,<table>]) : integer
 sc0_sess_cnt([<table>]) : integer
 sc1_sess_cnt([<table>]) : integer
 sc2_sess_cnt([<table>]) : integer
@@ -9893,7 +9893,7 @@ sc2_sess_cnt([<table>]) : integer
   backend sessions if some HTTP keep-alive is performed over the connection
   with the client. See also src_sess_cnt.
 
-sc_sess_rate(<ctr>,[<table>]) : integer
+sc_sess_rate(<ctr>[,<table>]) : integer
 sc0_sess_rate([<table>]) : integer
 sc1_sess_rate([<table>]) : integer
 sc2_sess_rate([<table>]) : integer
@@ -9904,7 +9904,7 @@ sc2_sess_rate([<table>]) : integer
   connection could result in many backend sessions if some HTTP keep-alive is
   performed over the connection with the client. See also src_sess_rate.
 
-sc_tracked(<ctr>,[<table>]) : boolean
+sc_tracked(<ctr>[,<table>]) : boolean
 sc0_tracked([<table>]) : boolean
 sc1_tracked([<table>]) : boolean
 sc2_tracked([<table>]) : boolean
@@ -9912,7 +9912,7 @@ sc2_tracked([<table>]) : boolean
   the current session. This can be useful when deciding whether or not we want
   to set some values in a header passed to the server.
 
-sc_trackers(<ctr>,[<table>]) : integer
+sc_trackers(<ctr>[,<table>]) : integer
 sc0_trackers([<table>]) : integer
 sc1_trackers([<table>]) : integer
 sc2_trackers([<table>]) : integer