doc: Fix the Doxygen section endings

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/src/gsm/a5.c b/src/gsm/a5.c
index 34f271a..356060a 100644
--- a/src/gsm/a5.c
+++ b/src/gsm/a5.c
@@ -364,4 +364,4 @@
 	}
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/gsm/abis_nm.c b/src/gsm/abis_nm.c
index 5c3647c..f6d4003 100644
--- a/src/gsm/abis_nm.c
+++ b/src/gsm/abis_nm.c
@@ -452,4 +452,4 @@
 	return GSM_PCHAN_NONE;
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/gsm/lapdm.c b/src/gsm/lapdm.c
index e0b7943..f123cb6 100644
--- a/src/gsm/lapdm.c
+++ b/src/gsm/lapdm.c
@@ -1241,4 +1241,4 @@
 	lapdm_entity_set_flags(&lc->lapdm_acch, flags);
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/gsm/rsl.c b/src/gsm/rsl.c
index db276a2..5693b4f 100644
--- a/src/gsm/rsl.c
+++ b/src/gsm/rsl.c
@@ -504,4 +504,4 @@
 	return msg;
 }
 
-/*! }@ */
+/*! @} */
diff --git a/src/gsm/tlv_parser.c b/src/gsm/tlv_parser.c
index c832d56..0ac9092 100644
--- a/src/gsm/tlv_parser.c
+++ b/src/gsm/tlv_parser.c
@@ -186,4 +186,4 @@
 		tvlv_att_def.def[i].type = TLV_TYPE_TvLV;
 }
 
-/*! }@ */
+/*! @} */