footnote - how to change the length of lines and brackets

Question

can you tell me how can I get shorter line in \footnote{} and how can I get the proper height at bracket?

It should look like at the picture..

The current look of my tex document:

\documentclass[12pt,leqno,a4paper,notitlepage]{book}
\usepackage[utf8]{inputenc}
\renewcommand*{\thefootnote}{(\arabic{footnote})}

\begin{document}
Wykazemy za Abelem \footnote{ N. H. Abel (1802-1829), matematyk norweski.}
\end{document}]

Link to picture.

Answer 1

Using the scrextend package (KOMA-Script bun­dle), taken from this question, I can offer you this.

The scrextend pack­age makes some fea­tures of the KOMA-Script classes avail­able for other classes.

\documentclass{article}

\usepackage{scrextend}
\deffootnotemark{(\textsuperscript{\thefootnotemark})\enskip}

%% Taken from scrguien.pdf
% \deffootnote[mark width ]{indent }{parindent }{definition }
% \deffootnotemark{definition }
% \thefootnotemark

\usepackage[english]{babel}
\usepackage{blindtext}

\begin{document}

\blindtext\footnote{Text for footnote.}

\end{document}