I have a nested tabu table and am using \vspace to simulate an empty line in the same cell. At the end of the cell is text which spans two rows. (If either of these three conditions is not met the issue does not appear or is not as bad.)
The result is that the last line of text is very very close to the border of the table. This looks awkward. But I could not find any way to have more space there while all the three preconditions from above are met.
This is the minimal example code:
\documentclass[10pt,a4paper]{article}
\usepackage{tabu}
\begin{document}
\tabulinesep=3pt
\begin{tabu}{lp{5cm}}
a & a \\ \hline
b & inner table: \newline
\begin{tabu}{lX}
0: & descriptive text \\
1: & descriptive text \\
\end{tabu}
\vspace{8pt} \newline
Some longer text which will break into the next line. \\ \hline
c & c
\end{tabu}
\end{document}
And this is how it looks:


\newlineand leave a blank space before\vspace{8pt}– egreg Nov 13 '12 at 15:29