It seems that replacing one Rust macro incantation with another fixed the strange “multiple AST nodes” error. I’ll work on adding better and more convincing tests and will then ask the tool authors to merge the PR, after which we’ll be able to use ast-grep to search and replace Elixir code from the CLI. 
…if the owners of the tree-sitter-elixir re-publish the Rust crate with the right GitHub repo URL that is.
