I create superscripts for indexes for notes manually with \raisebox. What I don't like is that Latex changes the line spacing to fit a manual superscript into a line. For instance:
\documentclass{article}\usepackage{setspace}\begin{document}
\scriptsize
\parbox{3cm}{
\begin{spacing}{0.8}
TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
TEST TEST TEST {\tiny\raisebox{3pt}{b}}TEST TEST TEST TEST TEST
TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST\end{spacing}}
\ \ \ \ \ \ \ \ \
\parbox{3cm}{
\begin{spacing}{0.8}
TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
TEST TEST TEST TEST TEST TEST TEST TEST\end{spacing}}
\end{document}
creates (without the black lines)

Left \parbox with manual superscript (-> too much spacing in line before the superscript), right \parbox without (-> equal spacing).
How can I get rid of the extra spacing in the left \parbox. \raisebox can be replaced if there is a better way. It is ok if the superscript overlaps with the text in the previous line.