Using a custom enumeration is aligned differently than a default enumerate environment

Question

\documentclass{article}
\usepackage{enumerate}
\begin{document}

\begin{enumerate}
\item First Item
\item Second Item
\end{enumerate}

\begin{enumerate}[a.]
\item First Item
\item Second Item
\end{enumerate}

\end{docment}

The output then shows those two lists where the 1st list is slightly indented and the 2nd list seems to be aligned with the textbody. How could I achieve that the custom enumerate behaves as the default one?

Answer 1

This doesn't happen with enumitem. It is better to use enumitem instead of enumerate as the former is more flexible and modern.

\documentclass{article}
\usepackage{enumitem}
\begin{document}

\begin{enumerate}
\item First Item
\item Second Item
\end{enumerate}

\begin{enumerate}[label=\alph*.]
\item First Item
\item Second Item
\end{enumerate}

\end{document}