Text state carries between separate calls to ansi_to_html after upgrading to v6.0.0

[cmparsons]

Hey there!

We use this library for rendering deploy logs at Netlify. When upgrading to 6.0.0, I've noticed that if one call to ansi_to_html detects an ansi value that should bold the text, that bold state carries over to subsequent calls to ansi_to_html.

I've created a CodeSandbox comparing 5.2.1 and 6.0.0 behavior. The first bold ansi value appears around the Netlify Build line. In 6.0.0, it bolds all subsequent lines while this doesn't happen in v5.

A workaround is to create a new instance of AnsiUp for every call.

[silverwind]

I had been observing the same statefulness in v5.2.1 as well, thought it to be working as intended. For example a unclosed color opening sequence carried over to subsequent ansi_to_html calls.

[drudru]

@cmparsons - hi. thanks, I found the issue. I was being a little too pedantic with the "standard" SGR sequences.
Getting a fix together now.