Remove misspell and update CONTRIBUTING.md

It looks like `misspell` is no longer maintained and
the last commit was on `Mar 9, 2018`.

We already run `codespell` and it is an active project
with the last commit 5 days ago.

Also updated the CONTRIBUTING guide with more
information on `pre-commit` as well as listed `codespell`
as the spell checker.

https://github.com/codespell-project/codespell
https://github.com/client9/misspell
https://github.com/client9/misspell/issues/197

.github/workflows/lint.yml

@@ -6,16 +6,6 @@ permissions:
   contents: read
 
 jobs:
-  misspell:
-    name: Check spelling with misspell
-    runs-on: ubuntu-latest
-    steps:
-      - name: "Checkout ${{ github.ref }} ( ${{ github.sha }} )"
-        uses: actions/checkout@v3
-      - name: Install
-        run: wget -O - -q https://git.io/misspell | sh -s -- -b .
-      - name: Run misspell
-        run: git ls-files --empty-directory | xargs ./misspell -error
   pre-commit:
     name: Run pre-commit
     runs-on: ubuntu-latest

CONTRIBUTING.md

@@ -26,8 +26,8 @@ A framework for managing and maintaining multi-language `pre-commit` hooks.
 You need to first install `pre-commit` and then install the `pre-commit` hooks with `pre-commit install`.
 Now `pre-commit` will run automatically on git commit!
 
-It's usually a good idea to run the hooks against all the files when adding new hooks (usually `pre-commit` will only run on the changed files during git hooks).
-Use `pre-commit run --all-files` to check all files.
+It's usually a good idea to run the hooks against all the files when adding new hooks (usually `pre-commit`
+will only run on the changed files during git hooks). Use `pre-commit run --all-files` to check all files.
 
 To run a single hook use `pre-commit run --all-files <hook_id>`
 
@@ -37,12 +37,16 @@ Sometimes you might need to skip one or more hooks which can be done with the `S
 
 `$ SKIP=yamllint git commit -m "foo"`
 
-For convenience, we have added `pre-commit run --all-files` and `pre-commit autoupdate`
+For convenience, we have added `pre-commit run --all-files`, `pre-commit install` and `pre-commit autoupdate`
 to both the Makefile and the Rakefile. Run them with:
 
 - `make check` or `rake check`
+- `make checkinstall` or `rake checkinstall`
 - `make checkupdate` or `rake checkupdate`
 
+To configure `pre-commit` you can modify the config file [.pre-commit-config.yaml](.pre-commit-config.yaml).
+We use [GitHub Actions](.github/workflows/lint.yml) to run `pre-commit` on every pull request.
+
 ### pre-commit quick links
 
 - [Quick start](https://pre-commit.com/#quick-start)
@@ -52,19 +56,8 @@ to both the Makefile and the Rakefile. Run them with:
 
 ## Spell Checking
 
-We are running [misspell](https://github.com/client9/misspell) which is mainly written in
-[Golang](https://golang.org/) to check spelling with [GitHub Actions](.github/workflows/lint.yml).
-Correct commonly misspelled English words quickly with `misspell`. You can run `misspell` locally
-against all files with:
-
-```bash
-find . -type f | xargs ./misspell -error
-```
-
-Notable `misspell` help options or flags are:
-
-- `-i` string: ignore the following corrections, comma separated
-- `-w`: Overwrite file with corrections (default is just to display)
+We are using `pre-commit` to run [codespell](https://github.com/codespell-project/codespell)
+to check code for common misspellings. We have a small custom dictionary file [codespell.txt](codespell.txt).
 
 ## Coding conventions