In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+2660 (BLACK SPADE SUIT).
See also#
\backslashbase\lnotbase\negbase
The ♠ symbol (Black spade suit, U+2660), written as \spadesuit in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+2660 (BLACK SPADE SUIT).
\backslash base\lnot base\neg base