Inline rule for parsing [[span attributes]]content[[/span]].
Triggered by a BLOCK_OPEN ([[) token. Recognizes both span
and span_ block names. Parses HTML attributes after the block name,
then recursively parses inline content (including nested spans) until
the matching [[/span]] closing tag.
Inline rule for parsing
[[span attributes]]content[[/span]].Triggered by a
BLOCK_OPEN([[) token. Recognizes bothspanandspan_block names. Parses HTML attributes after the block name, then recursively parses inline content (including nested spans) until the matching[[/span]]closing tag.Fails if:
spanorspan_]]follows the attributes[[/span]]closing tag is found