help notes: minor fixes

mmgen/help/addrimport.py

@@ -50,7 +50,7 @@ This script uses that file to create an online view-only Monero wallet to
 match each offline signing wallet.  The set of view-only wallets currently
 configured via --xmrwallets comprises the user’s tracking wallet.
 
-If a view-only wallet for a given address already exists, it’s left untouched
+If a view-only wallet for a given index already exists, it’s left untouched
 and no action is performed.  To add view-only wallets to your tracking wallet,
 just specify additional wallet indexes via --xmrwallets during the offline
 setup process.

mmgen/help/help_notes.py

@@ -112,8 +112,9 @@ class help_notes:
 		return "'{}' or '{}'".format(self.proto.dfl_mmtype, MMGenAddrType.mmtypes[self.proto.dfl_mmtype].name)
 
 	def address_types(self):
+		from ..cfg import gc
 		from ..addr import MMGenAddrType
-		return """
+		return '' if gc.cmd_caps.use_coin_opt and self.proto.base_proto != 'Bitcoin' else """
 
 ADDRESS TYPES:
 

mmgen/help/txcreate.py

@@ -53,6 +53,10 @@ specified.
 
 	return f"""
 
+The transaction’s output is listed on the command line, while its input
+is chosen via an interactive menu.
+{outputs_info}{fee_info}""" if proto.base_proto == 'Monero' else f"""
+
 The transaction’s outputs are listed on the command line, while its inputs
 are chosen from a list of the wallet’s unspent outputs via an interactive
 menu.  Alternatively, inputs may be specified using the --inputs option.