415            active duration and are therefore free of race conditions between

   415            active duration and are therefore free of race conditions between

   416            closing a file on a background thread and reopening it. (If the

   416            closing a file on a background thread and reopening it. (If the

   417            file were opened multiple times, there could be unflushed data

   417            file were opened multiple times, there could be unflushed data

   418            because the original file handle hasn't been flushed/closed yet.)

   418            because the original file handle hasn't been flushed/closed yet.)

   419 

   419 

   421         only for writing), and is useful only if target file is

   421         only for writing), and is useful only if target file is

   422         guarded by any lock (e.g. repo.lock or repo.wlock).

   422         guarded by any lock (e.g. repo.lock or repo.wlock).

   423 

   423 

   424         To avoid file stat ambiguity forcibly, checkambig=True involves

   424         To avoid file stat ambiguity forcibly, checkambig=True involves

   425         copying ``path`` file opened in "append" mode (e.g. for

   425         copying ``path`` file opened in "append" mode (e.g. for