dumprevlog: handle being passed a mode parameter
This makes it closer to an actual file opener. Otherwise, it gets in the way
of a coming refactoring.
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false