normalize.py fails with Python 3.8

[downthomas]

normalize.py fails with Python 3.8 as cgi.escape has been removed.

2/5 Testing: html_normalization
2/5 Test: html_normalization
Command: "/usr/local/bin/python3" "-m" "doctest" "/Volumes/RAMDisk/cmark-0.29.0/test/normalize.py"
Directory: /Volumes/RAMDisk/cmark-0.29.0/build/testdir
"html_normalization" start time: Nov 27 20:04 EST
Output:
----------------------------------------------------------
**********************************************************************
File "/Volumes/RAMDisk/cmark-0.29.0/test/normalize.py", line 169, in normalize.normalize_html
Failed example:
    normalize_html('<a title="bar" HREF="foo">x</a>')
Exception raised:
    Traceback (most recent call last):
      File "/usr/local/lib/python3.8/doctest.py", line 1328, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest normalize.normalize_html[8]>", line 1, in <module>
        normalize_html('<a title="bar" HREF="foo">x</a>')
      File "/Volumes/RAMDisk/cmark-0.29.0/test/normalize.py", line 189, in normalize_html
        parser.feed(chunk.group(0))
      File "/usr/local/lib/python3.8/html/parser.py", line 111, in feed
        self.goahead(0)
      File "/usr/local/lib/python3.8/html/parser.py", line 171, in goahead
        k = self.parse_starttag(i)
      File "/usr/local/lib/python3.8/html/parser.py", line 345, in parse_starttag
        self.handle_starttag(tag, attrs)
      File "/Volumes/RAMDisk/cmark-0.29.0/test/normalize.py", line 69, in handle_starttag
        self.output += ("=" + '"' + cgi.escape(v,quote=True) + '"')
    AttributeError: module 'cgi' has no attribute 'escape'
**********************************************************************
1 items had failures:
   1 of  10 in normalize.normalize_html

Adding import html and replacing cgi.escape with html.escape fixed this. html.escape was added in Python 3.2 so it should be available for most now.

2/5 Test: html_normalization
Command: "/usr/local/bin/python3" "-m" "doctest" "/Volumes/RAMDisk/cmark-0.29.0/test/normalize.py"
Directory: /Volumes/RAMDisk/cmark-0.29.0/build/testdir
"html_normalization" start time: Nov 27 22:29 EST
Output:
----------------------------------------------------------
<end of output>
Test time =   0.13 sec
----------------------------------------------------------
Test Passed.

[jgm]

thanks!