Cfrgtkky

I'm trying to insert Octave code in a pdf containing the character ^. However when I copy the code from the generated pdf, the code doesn't run: The I already posted similar question and could solve the problem. However the problem reappeared. I suspect one of the loaded package is responsible.

Here is an example of code with the loaded packages

documentclass[a4paper, 12pt]{book}

usepackage{amssymb}

usepackage{amsmath}

usepackage{mathtools}

usepackage[utf8]{inputenc}

usepackage{geometry}

usepackage{url}

usepackage{framed}

usepackage{setspace}

usepackage{lmodern}

usepackage{multirow}

usepackage{listings}

usepackage{xcolor}

usepackage{upquote}

usepackage{hyperref}

hypersetup{

    colorlinks=true,

    linkcolor=blue,

    filecolor=magenta,      

    urlcolor=cyan,

}



usepackage{caption}

%usepackage{calrsfs}

%DeclareMathAlphabet{pazocal}{OMS}{zplm}{m}{n}



begin{document}

setlength{parindent}{0cm}

renewcommand{baselinestretch}{0.5}

title{Notes}

author{John Smith}

date{today}

maketitle



tableofcontents{}



definecolor{shadecolor}{RGB}{240,248,255}

begin{shaded}

    begin{verbatim}

x^2

    end{verbatim}

end{shaded}





end{document}

I am providing this as a provisory answer to give a workaround awaiting the fonts expert (... or experts).

MWE:

documentclass{article}

%usepackage[T1]{fontenc}

usepackage{lmodern}

begin{document}

thispagestyle{empty}

texttt{xstring^2}

showoutput

end{document}

Uncomment the fontenc line to fix the issue. Then copy-pasting from PDF gives a normal ascii caret, not a MODIFIER LETTER CIRCUMFLEX ACCENT U+02C6 (letter ˆ)