missing space between name of wms endpoint and layer name

[Klumbumbus]

What steps will reproduce the problem?

1. add a wms endpoint layer e.g. wiki:Maps/Germany#Saxonyparcelsanddistricts
2. choose one or more layers, e.g. Gemarkung and Gemarkungsname

What is the expected result?

a space between the words "districts" and "Gemarkung"

What happens instead?

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: 2019-08-18 21:36:12 +0200 (Sun, 18 Aug 2019)
Build-Date:2019-08-19 01:30:50
Revision:15301
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15301 de) Windows 10 64-Bit
OS Build number: Windows 10 Pro 1903 (18362)
Memory Usage: 1477 MB / 1820 MB (729 MB allocated, but free)
Java version: 1.8.0_221-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1680x1050
Maximum Screen Size: 1680x1050
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=C:\Program Files (x86)\josm-latest.jnlp, -Djnlpx.remove=false, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=NULL,2048m, -Djnlpx.splashport=50857, -Djnlpx.jvm=<java.home>\bin\javaw.exe]
Dataset consistency test: No problems found