- I4 — TestRenderAll now seeds Name/Company with XML-significant chars
that actually hit the render pipeline via cardTitle(). Previous test
checked Bio which is no longer rendered, so the assertion was vacuous.
- New TestDonutSingleSlice guards against the I1 empty-arc regression:
asserts the single-slice path emits <circle> primitives and not the
degenerate A-command path.
- New TestDonutEmpty covers the zero-stats fallback.
- New TestUTCOffsetLabel pins the UTC±N.NN format across UTC,
Asia/Saigon, Asia/Kolkata (half-hour), Asia/Kathmandu (quarter-hour).
Catches %+.2f regressions.
