wasm (even when wasm-node/ itself is untouched) marked as spelling problem

**What got flagged?**
wasm

**Why is this incorrect?**
wasm (even when wasm-node/ itself is untouched) marked as spelling problem. "Node.js can run WebAssembly (Wasm) modules using the built-in global WebAssembly object, which provides APIs to compile, validate, and instantiate .wasm files."

**Example of correct usage:**
No spelling problems.

Reproduce the spelling warning for "wasm" in the grammar checker, noting that the report applies even when wasm-node/ is untouched. Trace the spelling-checking entry point and add coverage showing that the documented WebAssembly usage is not flagged; done means the example produces no spelling problems.

Written by the indexing model from the issue text.