Oddio avrò sbagliato?
`\documentclass[a4paper]{article}
\usepackage[italian]{babel}
\usepackage{microtype}
\usepackage{booktabs}
\usepackage{ulem}
\usepackage{graphicx}
\usepackage{subfig}
\usepackage[latin1]{inputenc}
\usepackage{indentfirst}
\usepackage{booktabs}
\usepackage[ansinew]{inputenc}
\usepackage[T1]{fontenc}
\author{S.~Zaminga[prova di relazione]}
\title{}
\makeatletter
\newcommand\xunderline[1]{\vtop{
\def\m@rule{\vrule \@height .4\p@ \@width 2.5\p@}
\setbox\z@=\hbox{#1}\dimen\z@=\wd\z@
\box\z@\nointerlineskip\kern1\p@
\setbox\z@=\hbox{\hskip1.5\p@\myrule}
\hb@xt@\dimen\z@{\m@rule\xleaders\copy\z@\hfill\hskip1.5\p@\m@rule}}}
\makeatother
\def\dashuline{\bgroup
\ifdim\ULdepth=\maxdimen % Set depth based on font, if not set already
\settodepth\ULdepth{(j}\advance\ULdepth.4pt\fi
\markoverwith{\kern.15em
\vtop{\kern\ULdepth \hrule width .3em}%
\kern.15em}\ULon}
\begin{document}`
Ho creduto bene di metterlo prima dell’inizio del documento.