No margins around tabular by default?

Question

How can I set the margins around all tabulars to zero by default?

The margins around a single tabular can be removed using @{}, see below, but I have dozens of tables and would like to have a single switch for all of them.

\begin{tabular}{@{}ll@{}}

Source: How can the margins around a table set to 0pt?

Answer 1

Just for fun. This trims off the edge using a \makebox. The \fbox is just to show the actual dimensions.

\documentclass{standalone}

\let\oldtabular=\tabular
\let\oldendtabular=\endtabular
\def\tabular{\bgroup\sbox0\bgroup\oldtabular}
\def\endtabular{\oldendtabular\egroup
  \makebox[\dimexpr\wd0-2\tabcolsep][c]{\usebox0}%
\egroup}

\begin{document}
\fboxsep=0pt
\fbox{\begin{tabular}{lr}
  this&is\\
  why&I\\
  hate&making\\
  My&own MWE
\end{tabular}}
\end{document}