Update chapters/syntax.tex

Co-authored-by: Henrik Tidefelt <henrikt@wolfram.com>

chapters/syntax.tex

@@ -31,7 +31,7 @@ \section{Lexical conventions}\label{lexical-conventions}
    |   "."  UNSIGNED-INTEGER [ ( "e" | "E" ) [ "+" | "-" ] UNSIGNED-INTEGER ]
 \end{lstlisting}
 \textrm{S-CHAR} is any member of the Unicode character set
-(\url{http://www.unicode.org}; see \cref{mapping-package-class-structures-to-a-hierarchical-file-system} for storing as UTF-8 on files) except double-quote """, and backslash "\textbackslash{}"
+(\url{http://www.unicode.org}; see \cref{mapping-package-class-structures-to-a-hierarchical-file-system} for storing as UTF-8 on files) except double-quote `"', and backslash `\textbackslash{}'.
 
 For identifiers the redundant escapes (`\lstinline!\?!' and `\lstinline!\"!') are the same as the corresponding non-escaped
 variants (`\lstinline!?!' and '\lstinline!"!').  The single quotes are part of an identifier. E.g.\ \lstinline!'x'! and