How to prevent line break before quotation mark when using a different font in quotation

Question

I have

\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}

\newcommand\french[1]{\!\!
  \fontfamily{jkplkvos}\selectfont
  #1
  \fontfamily{\familydefault}\selectfont \!\!}

\begin{document}

\qquad The closest Modern French equivalent to the Middle French word
``\french{par}'' is ``par''.

\end{document}

How do I prevent the line break between \french{par} and ''?

Answer 1

Eliminating the \! and adding % to eliminate the spurious spaces yields:

References:

• Tex Capacity Exceeded (if remove % after use of macro)

Code:

\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\newcommand\french[1]{%
  \fontfamily{jkplkvos}\selectfont
  #1%
  \fontfamily{\familydefault}\selectfont}
\begin{document}
\qquad The closest Modern French equivalent to the Middle French word
\french{par}'' ispar''.
\end{document}