Cannot Reach Trac Anchors in Help Browser

[Hb---]

What steps will reproduce the problem?

1. Open the Help Browser
2. Click on an anchor hyperlink generated by Trac.

What is the expected result?

The help page scrolls to the position of the anchor.

What happens instead?

The error message "Failed to open help page. The target URL is empty.​" appears.

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

JOSMs wiki pages have two kinds of references to anchors. The first are generated by PageOutline and TOC macros and have the format #anchortarget. The second kind is generated by Trac alone and has the format wiki/path/pagename#anchortarget. Please see an example with both kinds in the SandBox.

The second format does not fit the Regex s.matches("#.*")​ which wants a # sign as first character.

I suggest to change the search criteria.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-02-19 01:14:22 +0100 (Mon, 19 Feb 2018)
Build-Date:2018-02-19 00:19:27
Revision:13446
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13446 en) Windows 7 64-Bit
OS Build number: Windows 7 Professional (7601)
Memory Usage: 909 MB / 3604 MB (424 MB allocated, but free)
Java version: 1.8.0_161-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1280x1024
Maximum Screen Size: 1280x1024
Program arguments: [--language=en, --trace]
Dataset consistency test: No problems found

Last errors/warnings:
- E: Failed to open help page - Failed to open help page. The target URL is empty.