whitespace fixes

Remove trailing spaces and tabs.
Consistently use a 4 space tab instead of spaces.
Ensure comment marker has space (or tab) before text.

No functional change except for change in whitespace.

102232-1/LI-PS-PDU.asn

@@ -732,4 +732,4 @@ LawfulInterceptionIdentifier ::= Common-Parameters.LIID
 	-- module to preserve the original type name during the
 	-- removal of imports from ETSI TS 101 671 [4].
 
-END --end of LI-PS-PDU
+END -- end of LI-PS-PDU

102232-3/IPAccessPDU.asn

@@ -364,4 +364,3 @@ PDSRSummaryTrigger ::= ENUMERATED
 
 
 END -- end of IPAccessPDU
-

102232-6/PstnIsdnPDU.asn

@@ -10,8 +10,6 @@ BEGIN
 
 IMPORTS
 
-	
-
 	-- from TS 102 232-01 [2]
 	PayloadDirection
 		FROM LI-PS-PDU

103462/ILHIPDU.asn

@@ -125,4 +125,4 @@ SupplementaryLocationData	::= SEQUENCE
 	...
 }
 
-END  --end of ILHIPDU
+END -- end of ILHIPDU