Removed trailing whitespace

Author: WillAyd

doc/source/whatsnew/v1.0.0.rst

@@ -356,7 +356,7 @@ I/O
 - Bug in :meth:`DataFrame.read_json` where using ``orient="index"`` would not maintain the order (:issue:`28557`)
 - Bug in :meth:`DataFrame.to_html` where the length of the ``formatters`` argument was not verified (:issue:`28469`)
 - Bug in :meth:`pandas.io.formats.style.Styler` formatting for floating values not displaying decimals correctly (:issue:`13257`)
-- Bug in :meth:`DataFrame.to_clipboard` which did not work reliably in ipython (:issue:`22707`)  
+- Bug in :meth:`DataFrame.to_clipboard` which did not work reliably in ipython (:issue:`22707`)
 
 Plotting
 ^^^^^^^^