D3665: graph: improve graph output by using Unicode characters

[indygreg (Gregory Szorc)]

indygreg added a comment.


  FWIW, this isn't rendering nicely with PuTTY on Windows 10. The U+25EF ◯ glyph is being truncated on the right side. I'm also seeing empty squares for U+233E ⌾ and other code points. Using Courier New as the terminal font. `LANG=en_US.UTF-8` and `TERM=xterm-256color`, so Mercurial detects the encoding as UTF-8.
  
  Not a show stopper. But a bit disappointing. I can probably safely blame PuTTY/Windows here.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3665

To: johnstiles, #hg-reviewers
Cc: indygreg, smf, yuja, mercurial-devel