D3665: graph: improve graph output by using Unicode characters

[johnstiles (John Stiles)]

johnstiles added a comment.


  I'm finding that on OS X, the following two glyphs get good results in almost every font, and great results in Menlo and DejaVu Sans Mono. I wish they popped a little more in Ubuntu Mono but they are still better than the current choices. I'll switch over to Linux now to verify there.
  U+235F	⍟	 
  U+25CB	○

REPOSITORY
  rHG Mercurial

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

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