doc: Fix the Doxygen section endings

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/src/vty/command.c b/src/vty/command.c
index fda2e17..c84c612 100644
--- a/src/vty/command.c
+++ b/src/vty/command.c
@@ -3322,4 +3322,4 @@
 	srand(time(NULL));
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/vty/telnet_interface.c b/src/vty/telnet_interface.c
index 001b016..7712041 100644
--- a/src/vty/telnet_interface.c
+++ b/src/vty/telnet_interface.c
@@ -220,4 +220,4 @@
 	talloc_free(tall_telnet_ctx);
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/vty/utils.c b/src/vty/utils.c
index 47b9931..b3223ed 100644
--- a/src/vty/utils.c
+++ b/src/vty/utils.c
@@ -60,4 +60,4 @@
 	};
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/vty/vty.c b/src/vty/vty.c
index da03596..04df2be 100644
--- a/src/vty/vty.c
+++ b/src/vty/vty.c
@@ -1768,4 +1768,4 @@
 	return rc;
 }
 
-/*! }@ */
+/*! @} */