# Citation on first line causes whitespace indent

tex code:

\documentclass[a4paper,12pt]{article}
\usepackage{cite}
\setlength\parindent{0pt}
\begin{document}
\section*{First Chapter}
\cite{naiveset} First line. \newline
\cite{knuthwebsite} Second line.
\bibliography{test}{}
\bibliographystyle{unsrt}
\end{document}


I want the result to look like this:

[1] First line.
[2] Second line.


But the result is that the first line is indented with one space, like this:

 [1] First line.
[2] Second line.


What is the reason, and how to fix it?

From the cite package manual:

Space before Regular-text citations have the preceding space adjusted to be a normal inter-word space, even if there is no space in the input. The [noadjust] option disables this. Superscript citations have all precedingspace removed.

\documentclass[a4paper,12pt]{article}