When adding trolleybus=yes to a stop_position JOSM suggests trolley_bus.

[LeoSlager@…]

What steps will reproduce the problem?

1. select a stop_position for a trolleybus.
2. Add trolleybus=yes
3. The editor suggests that it should be trolley_bus wich is not correct.

What is the expected result?

Bij adding "trol" in the editor it should show trolleybus

What happens instead?

the editor suggests trolley_bus wich is not correct.

Please provide any additional information below. Attach a screenshot if possible.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-11-28 01:09:01 +0100 (Wed, 28 Nov 2018)
Build-Date:2018-11-28 00:26:41
Revision:14460
Relative:URL: ^/trunk

Identification: JOSM/1.5 (14460 nl) Windows 7 64-Bit
OS Build number: Windows 7 Professional (7601)
Memory Usage: 340 MB / 989 MB (173 MB allocated, but free)
Java version: 1.8.0_191-b12, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1440x900
Maximum Screen Size: 1440x900
Dataset consistency test: No problems found

Plugins:
+ reverter (34552)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/NumberedWalkingNodeNetworks&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/NumberedCycleNodeNetworks&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransportV2&zip=1

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.

[Klumbumbus]

The internal preset uses the correct spelling "trolleybus". So in your case it seems somewhere in your current dataset there was already the wrong spelling used. In the AddValue dialog the drop down boxes contain (additional to all preset values) all values which are in the current dataset and those which are in the list below the drop down boxes.