service/dap: use == to test io.EOF #3464
Merged
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The documentation of io.EOF:
Read must return EOF itself, not an error wrapping EOF, because callers will test for EOF using ==.
This is a trivial change; people may think it's normal use of "errors.Is", even it's OK, it could be
replaced with "errors.Is(err, io.EOF)" in idiomatic way.