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If I type in a CygWin Bash shell forma TAB, the result expands to format.com.
But if I type modeTABTAB, the results expands to:

$ mode
mode.com     modemui.dll

As long as .DLL files are not directly executables, I don't see the sense of this behavior for CygWin. Nor is it the behavior in usual Linux shell.

Any explanations, please?

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