DOC: remove double blanks in configuration.txt

Double blanks in keywords are not good for the html documentation parser.
This commit fixes the double blanks for tcp-request content use-service.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 87ae438..cb05fef 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -3118,7 +3118,7 @@
   As previously mentioned, "peer" keyword may be replaced by "server" keyword
   with a support for all "server" parameters found in 5.2 paragraph.
   If the underlying peer is local, <ip>:<port> parameters must not be present.
-  These parameters must  be provided on a "bind" line (see "bind" keyword
+  These parameters must be provided on a "bind" line (see "bind" keyword
   of this "peers" section).
   Some of these parameters are irrelevant for "peers" sections.
 
@@ -12553,7 +12553,7 @@
   This is used to unset a variable. Please refer to "http-request set-var" for
   details about variables.
 
-tcp-request content  use-service <service-name>  [ { if | unless } <condition> ]
+tcp-request content use-service <service-name> [ { if | unless } <condition> ]
 
   This action is used to executes a TCP service which will reply to the request
   and stop the evaluation of the rules. This service may choose to reply by