[Patch] Tag checker: report codepoint of unusual Unicode character

[simon04]

Suggested in ticket:18740#comment:2

Note: the screenshot shows the problem and suggests changing the message reported by JOSM validator: it should display the Unicode code point (in the standard form U+NNNN with 4 to 6 uppercase hexadecimal digits) at end of the message, for proper identification (and possibly the character name if you have the Unicode character database; if it is non combining with the general category "W*", "P*" "S*", "N*", "L*", the literal character should be displayed between quotation marks, like "‹ɛ›" here)

[simon04]

In 15994/josm:

fix #18741 - Tag checker: report codepoint of unusual Unicode character

[anonymous]

oups this report on letters should have been in #18740, where I reposted it.