various comment / whitespace tweaks (libmsc, gprs, libcommon-cs)

cosmetic ws in common_cs_vty.c, osmo_msc.c

comment: tiny typo fix in gsm_04_08.c

In comments, drop some unbalanced braces, because simplistic C file harvesters
will break at a single opening brace even if it is in a comment. This is aimed
at the fsm-to-dot.py script in libosmocore/contrib.

Change-Id: I3c1fa53195a1e57d6fe0a6791c346d30ceff1251
diff --git a/openbsc/src/libmsc/osmo_msc.c b/openbsc/src/libmsc/osmo_msc.c
index 12a5117..2389980 100644
--- a/openbsc/src/libmsc/osmo_msc.c
+++ b/openbsc/src/libmsc/osmo_msc.c
@@ -131,7 +131,7 @@
 static struct bsc_api msc_handler = {
 	.sapi_n_reject = msc_sapi_n_reject,
 	.compl_l3 = msc_compl_l3,
-	.dtap  = msc_dtap,
+	.dtap = msc_dtap,
 	.clear_request = msc_clear_request,
 	.assign_compl = msc_assign_compl,
 	.assign_fail = msc_assign_fail,