Some lexers lack aliases

[8day]

As far as I can tell, get_lexer_by_name() is in fact get_lexer_by_alias(). So if lexer name is not listed under aliases, you won't be able to find such lexer through get_lexer_by_name().

ATM at least lexers/special.py:TextLexer and lexers/special.py:OutputLexer don't have their names present in their aliases.

class TextLexer(Lexer):
    """
    "Null" lexer, doesn't highlight anything.
    """
    name = 'Text only'
    aliases = ['text'] # This should be ['text only', 'text'].
    filenames = ['*.txt']
    mimetypes = ['text/plain']
    priority = 0.01

    def get_tokens_unprocessed(self, text):
        yield 0, Text, text

    def analyse_text(text):
        return TextLexer.priority

[jeanas]

Yes, the name get_lexer_by_name() is unfortunately misleading. However, it's not the intent that lexer.name should always be part of lexer.aliases. Basically, the name is meant to be a human-readable language name (esp. for listing at https://pygments.org/languages), and lexer.aliases is for lookup, e.g., in reST/Markdown code blocks.

[birkenfeld]

Yeah, maybe the docs need a tweak.