Route name with →. Tag value contains unusual Unicode haracter - Tag 'name' invalid

[Mazda05]

What steps will reproduce the problem?

Adding charater → to public transtpot route name value

What is the expected result?

​https://wiki.openstreetmap.org/wiki/Public_transport
<type of transport><reference number>: <from> → <to>
Human readable description of the route. <reference number> should be the value of ref=*. Examples: "Bus 201: Uitikon Waldegg, Bahnhof → Uitikon, Wängi" for a bus route or "Traion RE 7: Dessau Hbf → Wünstorf-Waldstadt" for a train route. If the line has no number in reality, only use the word "Bus" for buses or the type of train (e.g., IC, TGV or RE) for trains (e.g., RE Würzburg Hbf → Stuttgart Hbf. Note that "->", "=>", and "-->" can all be used in the place of the Unicode Character "→".

​https://wiki.openstreetmap.org/wiki/Talk:Proposed_features/Public_Transport#Use_proper_typography_in_Route_names

What happens instead?

Validation Results: Warning «Tag value contains unusual Unicode haracter - Tag 'name' invalid»

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: 2019-04-28 04:36:41 +0200 (Sun, 28 Apr 2019)
Build-Date:2019-04-28 02:37:58
Revision:15031
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15031 en) Windows 7 64-Bit
OS Build number: Windows 7 Ultimate (7601)
Java version: 1.8.0_201-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Dataset consistency test: No problems found

[Don-vip]

Closed as duplicate of #17667.