BUILD: halog: fix missing double-quote at end of help line

This will tell me to change the line format after testing :-(
This was introduced with commit 286199c24 ("DOC: halog: explain how to
use -ac and -ad in the help message"), no backport is needed unless it's
backported as well.
diff --git a/admin/halog/halog.c b/admin/halog/halog.c
index 7ff4363..f2b9dd7 100644
--- a/admin/halog/halog.c
+++ b/admin/halog/halog.c
@@ -206,12 +206,12 @@
 	       "       -ua : average response time, -ut : average total time\n"
 	       "       -uao, -uto: average times computed on valid ('OK') requests\n"
 	       "       -uba, -ubt: average bytes returned, total bytes returned\n"
-	       " -hdr  output captured header at the given <block>:<field>\n",
-	       " -ac <count> -ad <delay>:\n
+	       " -hdr  output captured header at the given <block>:<field>\n"
+	       " -ac <count> -ad <delay>:\n"
 	       "       Report periods corresponding to a grouped accept of <count> requests at\n"
 	       "       the same millisecond after a delay of at least <ad> milliseconds with no\n"
 	       "       incoming accept (used to spot network outages). Output format contains:\n"
-	       "          <accept_date> <date_ms> <delta_ms from previous one> <nb_entries>\n"
+	       "          <accept_date> <date_ms> <delta_ms from previous one> <nb_entries>\n",
 	       (int)SOURCE_FIELD, (int)SOURCE_FIELD
 	       );
 	exit(0);