syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// we have an opt-in scheme here, so one is hopefully forced to think about
context_before: /// `Hash` implementation for `DepTrackingHash`. It's important though that
context_after: /// how the hash should be calculated when adding a new command-line argument.