Looking for real-world examples of strings and format where checks highlights overlap without being nested

[gersona]

I'm working on #18932, improving how Weblate handles overlapping, non-nested placeholder spans but struggle to find actual examples .

What we're looking for

A partially-overlapping span occurs when two flags both match part of the same substring, but neither is fully contained by the other. For example, on the string $USER_NAME$ items:

• Pattern A $\w+ → matches $USER_NAME (0, 10)
• Pattern B \w+$ → matches USER_NAME$ (1, 11)

These partially overlap at USER_NAME — neither span is nested inside the other.

If you've configured a placeholders: flag (regex or literal) alongside a format flag like i18next-interpolation, python-brace-format, or similar, and noticed unexpected highlighting or autofix behavior, we'd love to see:

• Your placeholders: flag value (the regex or literal patterns)
• An example source string that triggers the overlap
• The format type (i18next, WebExtension JSON, ARB, etc.)

See also #18953

[nijel]

I did a scan on some of our production servers using inspect-overlaps.py and it revealed nothing. So let's assume this is more a theoretical possibility than real-world usage.