drawdag: correctly pass repo to super constructor
This was caught by someone who was looking for the
super(cls, self).__init__(self, ...)
pattern in all code in our Google-internal repo.
Differential Revision: https://phab.mercurial-scm.org/D4464
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2