Better modeline; only keeps tabs.

vcsh

@@ -677,11 +677,9 @@ exit $VCSH_COMMAND_RETURN_CODE
 # Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 #
 # Local variables:
-# c-basic-offset: 8
-# tab-width: 8
 # indent-tabs-mode: t
 # End:
 #
-# vi: set shiftwidth=8 tabstop=8 noexpandtab:
-# :indentSize=8:tabSize=8:noTabs=false:
+# vi: set noexpandtab:
+# :noTabs=false:
 #