0.12.0-rc3: TVM improvements

• 0.12.0-rc3 (2024-06-21)
  • TVM
    • reduce rounding errors when PYR==CYR, the most common case in the US
      at least
  • Bug Fix: update logic that determines when the comma , character can
    be inserted into the input buffer
    • some internal routines were still looking at the last character in the
      input buffer, instead of the character to the left of the current
      cursor
      • prevented comma insertion when the cursor was scrolled into the
        middle of the input buffer
      • updated to look at the char to the left of cursor
    • update logic that handles left and right braces { }
      • comma now allowed only inside an open left-brace {
      • comma no longer allowed after the last closing right-brace }