fix treefmt --stdin when changes are moved into tempfile #225
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With the following config: ``` [formatter.cpp] command = "clang-format" options = ["-i"] includes = ["*.cpp"] ``` `treefmt --stdin foo.cpp < foo.cpp` would error: ``` [ERROR] original tempfile has been replaced at path "/home/oleh/src/treefmt/_tmpoZwnEJfoo.cpp" ``` ..since `clang-format` creates its own tempfile and then moves it into our own tempfile, replacing it and causing `tmpfile.reopen()` to fail.
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With the following config:
treefmt --stdin foo.cpp < foo.cppwould error:..since
clang-formatcreates its own tempfile and then moves it into our own tempfile,replacing it and causing
tmpfile.reopen()to fail.