simplemerge: store input data in MergeInput
I want to be able to update the file contents for support for partial
conflict resolution. Having the text available (and later settable) on
`MergeInput` will enable that.
Differential Revision: https://phab.mercurial-scm.org/D12144
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2