* Make certain characters slightly wider under Quasi-Proportional. Affected characters:
  - CYRILLIC CAPITAL LETTER IOTIFIED YAT (`U+A652`).
  - CYRILLIC SMALL LETTER IOTIFIED YAT (`U+A653`).
  - CYRILLIC LETTER MULTIOCULAR O (`U+A66E`).
* Refine shape of the following characters:
  - CYRILLIC SMALL LETTER TALL YAT (`U+1C87`).
  - MATHEMATICAL DOUBLE-STRUCK SMALL A (`U+1D552`) (#2769).
