The Lexer class in the sqlparse library needs to be refactored into a singleton with configurable syntax…

The Lexer class in the sqlparse library needs to be refactored into a singleton with configurable syntax…: a task in repo2rlenv-swe-gen (Harbor dataset). Example: after calling Lexer.get default instance().add keywords({"BACON": sqlparse.tokens.Name.Builtin, "SPAM": sqlparse.tokens.Keyword…