syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! standard was never formally specified and WASI has since evolved to a
context_before: //! version of the WASI standard, called "preview1". This version of the
context_after: //! "preview2". This target in rustc uses the previous version of the proposal.