Log buffering can result to confusing output

[tuulos]

Task stdout is buffered, which results to a delay in log output. This can be confusing especially with a small amount of output. See #165 for an example.

[simon-lyons]

Just a note to say that a newline character in a string will trigger this issue.
print("foo\nbar") will print foo, but bar will not be printed until the next call to print().

This behaviour causes issues when e.g. trying to print the contents of a Pandas dataframe (especially while debugging), since dataframes are pretty-printed with newline characters.

[dotKokott]

Any solutions to this by now? It would be great to be able to pro-actively flush the buffer!