BUG: to_clipboard output formatting
closes  https://github.com/pydata/pandas/issues/8305

@jreback I made the simple patch as you suggested for fixing truncated columns, although problem seems to be https://github.com/pydata/pandas/blob/master/pandas/core/format.py#L2118 called from https://github.com/pydata/pandas/blob/master/pandas/core/format.py#L411
Perhaps `conf_max` should respect if caller passes `minimum` argument so it wont truncate?

Second issue, where `index=False` was ignored (or just any other argument when `excel=False`) was because arguments were not passed to underlying function `obj.to_string()` and that was easy fix.

I added test for checking if column width greater then `max_colwidth` passes clipboard test.

not sure I understand the first part of what you are saying?
 > not sure I understand the first part of what you are saying?

you are right...

[L2118](https://github.com/pydata/pandas/blob/master/pandas/core/format.py#L2118) is where `to_string()` truncates to `max_colwidth`, but I wrongly assumed that `minimum` argument passed to `_make_fixed_width()` is the actual width of column value represented as string, while that value seems to deal with column header instead. I should have checked better...
 merged via https://github.com/pydata/pandas/commit/8a169001b95f25095b619f5e0770fe15005909ee

thanks!
