class_docstr: For ca65 assembler sources.
  
  .. versionadded:: 1.6
code: def analyse_text(self, text):
      # comments in GAS start with "#"
      if re.search(r"^\s*;", text, re.MULTILINE):
          return 0.9
  
imports: import re
  from pygments.lexer import RegexLexer, include, bygroups, using, words, DelegatingLexer, default
  from pygments.lexers.c_cpp import CppLexer, CLexer
  from pygments.lexers.d import DLexer
  from pygments.token import Text, Name, Number, String, Comment, Punctuation, Other, Keyword, Operator, Whitespace
label_desc: Use image node_id 1 for calling the Ca65Lexer obj's underlying member method code with example usage: obj.analyse_text(text) and returns: int