Generate correct html from xterm colors.

termstr/termstr.py

@@ -147,9 +147,9 @@ class CharStyle:
         underline_code = ("text-decoration:underline; "
                           if self.is_underlined else "")
         fg_color = (self.fg_color if type(self.fg_color) == tuple
-                    else xterm_colors[self.fg_color])
+                    else XTERM_COLORS[self.fg_color])
         bg_color = (self.bg_color if type(self.bg_color) == tuple
-                    else xterm_colors[self.bg_color])
+                    else XTERM_COLORS[self.bg_color])
         return (f"<style>.S{id(self)} {{font-size:80%%; color:rgb{fg_color!r};"
                 f" background-color:rgb{bg_color!r}; "
                 f"{bold_code}{italic_code}{underline_code}}}</style>")

termstr/tests/termstr_test.py

@@ -1,7 +1,6 @@
 #!/usr/bin/env python3.9
 
 
-import os
 import pickle
 import unittest