add: spellcheck CI

.config/typos.toml

@@ -0,0 +1 @@
+[default.extend-words]

.github/workflows/lints.yml

@@ -30,7 +30,6 @@ jobs:
     name: Various lints
     timeout-minutes: 30
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
@@ -62,11 +61,15 @@ jobs:
         with:
           command: clippy
           args: --all-features --all-targets -- -D warnings
+      - name: Use typos with config file
+        uses: crate-ci/typos@master
+        with:
+          config: .config/typos.toml
 
       # Ensure intra-documentation links all resolve correctly
       # Requires #![deny(intra_doc_link_resolution_failure)] in crates.
       - name: Check intra-doc links
         uses: actions-rs/cargo@v1
         with:
           command: doc
-          args: --no-deps --all --document-private-items
+          args: --no-deps --all --document-private-items

src/lib.rs

@@ -1,6 +1,6 @@
 //! This crate provides the poseidon gadget for use with `halo2_proofs`.
-//! This gadget has been stracted from zcash's halo2_gadgets:
-//! <https://github.com/zcash/halo2/tree/main/halo2_gadgets>
+//! This gadget has been extracted from zcash's halo2_gadgets:
+//! https://github.com/zcash/halo2/tree/main/halo2_gadgets
 
 #![cfg_attr(docsrs, feature(doc_cfg))]
 // Catch documentation errors caused by code changes.