[Patch] Warning about "placement:forward/backward=transition"

[skyper]

What steps will reproduce the problem?

1. Have a way with placement:forward/backward=transition
2. Run validator

What is the expected result?

A warning suggesting to use placement=transition

What happens instead?

No informational warning

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

There is no need to use forward/backward with transition but it does not really harm. Still tagging scheme would be more consistent if only placement=transition would be used.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-04-13 22:05:56 +0200 (Mon, 13 Apr 2020)
Revision:16294
Build-Date:2020-04-14 01:30:47
URL:https://josm.openstreetmap.de/svn/trunk

[skyper]

Oh, I see, there is no warning about multiple occurrences of placement[:forward/backward/both_ways]. This needs to be an error.

[skyper]

patch including warnings about multiple use and transition with placement:*

[skyper]

Find attached patch josm_19094.patch​ which adds warnings for both issues

• Warning about transition as values of placement:*
• Error for multiple use of placement[:*]

[skyper]

Once #19511 is fixed, autofixes could be enabled for all cases of transition as value of placement:* even with some different values for other placement:*.

[Klumbumbus]

In 16778/josm:

fix #19094 - Warn about placement:forward/backward=transition (patch by skyper)