Use same formatting for \thanks footnote as the one created by footmisc

Question

I change the layout of my footnotes with the footmisc package. Below, I flush the footnotemark to the left margin, and I include \doublespacing and \raggedright. But these have no effect on the footnote created by the \thanks command. Below, you can see that it is not flushed to the margin, it is not double spaced, and not ragged right. How can I enforce the same formatting for the \thanks footnote as for regular footnotes modified by \footmisc?

Note below that I have included code from this answer which removes the star created by \thanks after the title.

\documentclass{article}
\raggedright
\usepackage{setspace}
    \doublespacing
\usepackage[flushmargin, hang]{footmisc} % flush footnote mark to left margin
    \renewcommand{\footnotelayout}{\doublespacing\raggedright}
\usepackage{etoolbox}
    \makeatletter
        \patchcmd{\maketitle}
            {\def\@makefnmark}
            {\def\@makefnmark{}\def\useless@macro}
            {}{}
    \makeatother
\begin{document}
\title{My title\thanks{Doubtful two bed way pleasure confined followed. Shew up ye away no eyes life or were this. Perfectly did suspicion daughters but his intention. Started on society an brought it explain. Position two saw greatest stronger old. Pianoforte if at simplicity do estimating.}}
\maketitle
A sentence.\footnote{Doubtful two bed way pleasure confined followed. Shew up ye away no eyes life or were this. Perfectly did suspicion daughters but his intention. Started on society an brought it explain. Position two saw greatest stronger old. Pianoforte if at simplicity do estimating.} Another sentence.\footnote{Doubtful two bed way pleasure confined followed. Shew up ye away no eyes life or were this. Perfectly did suspicion daughters but his intention. Started on society an brought it explain. Position two saw greatest stronger old. Pianoforte if at simplicity do estimating.}
\end{document}

There's what appears to be a manual hack to enforce the left margin flush in Footnote on document author with footmisc, but I'd wonder if there's a more principled way of doing it (where does, for example, the size 1.8em come from in that hack?), and one that applies to the spacing and justification as well.

Answer 1

Don't ask more, please. ;-) But note the \strut in \footnotelayout or consecutive footnotes would be badly spaced.

\documentclass{article}

\usepackage{setspace}
\usepackage[flushmargin, hang]{footmisc} % flush footnote mark to left margin
\usepackage{regexpatch}
\makeatletter
% 1. remove all redefinitions about footnotes done by \maketitle
%    and add \titletrue
\regexpatchcmd{\maketitle}
 {\c{def}\c{@makefnmark}.*\c{if@twocolumn}}
 {\c{titletrue}\c{if@twocolumn}}
 {}{}
% 2. define a conditional
\newif\iftitle
% 3. redefine \@makefnmark to print nothing when \titletrue
\xpretocmd{\@makefnmark}{\iftitle\else}{}{}
\xapptocmd{\@makefnmark}{\fi}{}{}
% 4. ensure \@makefntext has \titlefalse
%    that's justified by the fact that \@makefnmark
%    in \@makefntext is set in a box
\xpretocmd{\@makefntext}{\titlefalse}{}{}

\makeatother

\renewcommand{\footnotelayout}{\doublespacing\raggedright\strut}
\doublespacing


\textheight=12cm % just to have a smaller picture

\begin{document}

\makeatletter
\makeatother

\title{My title\thanks{Doubtful two bed way pleasure confined followed. Shew up ye away no 
eyes life or were this. Perfectly did suspicion daughters but his intention. Started on 
society an brought it explain. Position two saw greatest stronger old. Pianoforte if at 
simplicity do estimating.}}

\author{Sverre}

\maketitle

A sentence.\footnote{Doubtful two bed way pleasure confined followed. Shew up ye away no eyes 
life or were this. Perfectly did suspicion daughters but his intention. Started on society an 
brought it explain. Position two saw greatest stronger old. Pianoforte if at simplicity do 
estimating.} Another sentence.\footnote{Doubtful two bed way pleasure confined followed. Shew 
up ye away no eyes life or were this. Perfectly did suspicion daughters but his intention. 
Started on society an brought it explain. Position two saw greatest stronger old. Pianoforte 
if at simplicity do estimating.}

\end{document}

If you can't use regexpatch, you can do

\usepackage{xpatch}
\makeatletter
% 1. remove all redefinitions about footnotes done by \maketitle
%    and add \titletrue
\renewcommand\maketitle{\par
  \begingroup
    \renewcommand\thefootnote{\@fnsymbol\c@footnote}%
    \titletrue
    \if@twocolumn
      \ifnum \col@number=\@ne
        \@maketitle
      \else
        \twocolumn[\@maketitle]%
      \fi
    \else
      \newpage
      \global\@topnum\z@   % Prevents figures from going at top of page.
      \@maketitle
    \fi
    \thispagestyle{plain}\@thanks
  \endgroup
  \setcounter{footnote}{0}%
  \global\let\thanks\relax
  \global\let\maketitle\relax
  \global\let\@maketitle\relax
  \global\let\@thanks\@empty
  \global\let\@author\@empty
  \global\let\@date\@empty
  \global\let\@title\@empty
  \global\let\title\relax
  \global\let\author\relax
  \global\let\date\relax
  \global\let\and\relax
}
% 2. define a conditional
\newif\iftitle
% 3. redefine \@makefnmark to print nothing when \titletrue
\xpretocmd{\@makefnmark}{\iftitle\else}{}{}
\xapptocmd{\@makefnmark}{\fi}{}{}
% 4. ensure \@makefntext has \titlefalse
%    that's justified by the fact that \@makefnmark
%    in \@makefntext is set in a box
\xpretocmd{\@makefntext}{\titlefalse}{}{}

\makeatother