I am writing my thesis and am having trouble with footnote citations with two lines.
The minimal working example is:
\documentclass[a4paper,11pt,oneside]{book}
\usepackage[hyperref=true,
url=false,
isbn=false,
doi=true,
backref=true,
style=custom-numeric-comp,
citereset=chapter,
maxcitenames=3,
maxbibnames=100,
backend=bibtex,
block=none]{biblatex}
\newlength{\spc} % declare a variable to save spacing value
\newcommand{\sjcitep}[2][]{% new command with two arguments: optional (#1) and mandatory (#2)
\settowidth{\spc}{#1}% set value of \spc variable to the width of #1 argument
\addtolength{\spc}{-1.8\spc}% subtract from \spc about two (1.8) of its values making its magnitude negative
#1% print the optional argument
\hspace*{\spc}% print an additional negative spacing stored in \spc after #1
\supershortnotecite{#2}}% print (cite) the mandatory argument
\addbibresource{testbib}
\begin{document}
\chapter*{Introduction}
Citation here \sjcitep{MPT3}
\end{document}
The testbib.bib file is:
@inproceedings{MPT3,
author = {M. Herceg and M. Kvasnica and C.N. Jones and M. Morari},
title = {{Multi-Parametric Toolbox 3.0}},
booktitle = {Proceedings of the European Control Conference},
year = {2013},
address = {Z\"urich, Switzerland}
}
It also requires some files which can be downloaded at http://www.khirevich.com/downloads/example_latex_bib_foot.rar
The output citation looks like this:

Yet I would like this, i.e. two-lines citation should be aligned.
