SMLLexer won't terminate on simple input #1625
Description
When the SMLLexer gets fed the string "exception" it seems to loop indefinitely. Here's a simple example:
from pygments import highlight
from pygments.lexers import SMLLexer
from pygments.formatters import HtmlFormatter
code = 'exception'
print(highlight(code, SMLLexer(), HtmlFormatter()))Tested on both
$ pygmentize -V
Pygments version 2.3.1, (c) 2006-2017 by Georg Brandl.
and
$ pygmentize -V
Pygments version 2.7.3, (c) 2006-2020 by Georg Brandl.
.