message: Update code style for our 90 char life
  We've been using 90 chars for JS code for quite a while now, but for some
  reason, the code style guide hasn't admitted that, so this adjusts it to match
  ESLint settings.
diff: @@ -22,7 +22,7 @@ number throgh from the original code to the final application.
  General Style
  -------------
  - 4 spaces to indent, for consistency with Matrix Python.
  -- 120 columns per line, but try to keep JavaScript code around the 80 column mark.
  +- 120 columns per line, but try to keep JavaScript code around the 90 column mark.
  Inline JSX in particular can be nicer with more columns per line.
  - No trailing whitespace at end of lines.
  - Don't indent empty lines.
  