Auto-format markdown; switch to double quotes for JS (#349)

* Add markdown to pre-commit prettier

* Prettify markdown; use single quotes

.github/GITHUB.md

@@ -16,8 +16,8 @@ to the "In progress" column.
 ### PR project automation
 
 This workflow archives PRs in the "Merged!" and "Closed" columns of the PR
-project board, 15 minutes after the commencement of the weekly developer chat
-at 15:00 UTC every Tuesday.
+project board, 15 minutes after the commencement of the weekly developer chat at
+15:00 UTC every Tuesday.
 
 **Cron:** [at 15:15 on Tuesday](https://crontab.guru/#15_15_*_*_2)
 
@@ -40,9 +40,9 @@ week, outlining the closed issues and merged PRs of the preceding week.
 
 ### New discussion notification
 
-This workflow makes a `POST` request to the Slack webhook when a new
-discussion is created, sending a notification message to the
-`#openverse-notifications` channel.
+This workflow makes a `POST` request to the Slack webhook when a new discussion
+is created, sending a notification message to the `#openverse-notifications`
+channel.
 
 **Discussion:** created
 
@@ -54,7 +54,7 @@ truth, it creates PRs to resolve any differences.
 
 **Cron:** [at 00:00](https://crontab.guru/#0_0_*_*_*)  
 **Push:** Branch `main`  
-**Dispatch:** enabled
+**Dispatch:** enabled  
 **Config:** `.github/sync.yml`
 
 ## Synced workflows
@@ -101,5 +101,5 @@ These workflows run only in the downstream synced repos and not in `openverse`.
 This workflow updates the draft release message when new commits are added to
 `main` so that there is a ready-to-go changelog when publishing a new release.
 
-**Push:** Branch `main`
+**Push:** Branch `main`  
 **Config:** `.github/release_drafter.yml`

.github/ISSUE_TEMPLATE/bug_report.md

@@ -6,28 +6,35 @@ title: "<Replace this with actual title>"
 ---
 
 ## Description
+
 <!-- Concisely describe the bug. Compare your experience with what you expected to happen. -->
 <!-- For example: "I clicked the 'submit' button and instead of seeing a thank you message, I saw a blank page." -->
 
 ## Reproduction
+
 <!-- Provide detailed steps to reproduce the bug. -->
+
 1. <!-- Step 1 ... -->
 2. <!-- Step 2 ... -->
 3. <!-- Step 3 ... -->
 4. See error.
 
 ## Screenshots
+
 <!-- Add screenshots to show the problem; or delete the section entirely. -->
 
 ## Environment
+
 <!-- Please complete this, unless you are certain the problem is not environment specific. -->
- - Device: <!-- (_eg._ iPhone Xs; laptop) -->
- - OS: <!-- (_eg._ iOS 13.5; Fedora 32) -->
- - Browser: <!-- (_eg._ Safari; Firefox) -->
- - Version: <!-- (_eg._ 13; 73) -->
- - Other info: <!-- (_eg._ display resolution, ease-of-access settings) -->
+
+- Device: <!-- (_eg._ iPhone Xs; laptop) -->
+- OS: <!-- (_eg._ iOS 13.5; Fedora 32) -->
+- Browser: <!-- (_eg._ Safari; Firefox) -->
+- Version: <!-- (_eg._ 13; 73) -->
+- Other info: <!-- (_eg._ display resolution, ease-of-access settings) -->
 
 ## Additional context
+
 <!-- Add any other context about the problem here; or delete the section entirely. -->
 
 <!-- If you would like to work on this, please comment below separately. -->

.github/ISSUE_TEMPLATE/discussion.md

@@ -6,13 +6,16 @@ title: "<Replace this with actual title>"
 ---
 
 <!-- Consider how soon we need the discussion resolved vs. giving everyone an opportunity to participate.  -->
+
 ## Due date: yyyy-mm-dd
 
 <!-- Suggest two members of @WordPress/openverse to review the discussion.  -->
+
 ## Assigned reviewers
 
 - [ ] TBD
 - [ ] TBD
 
 <!-- Start the conversation. Please @ anyone relevant and try to ask questions to help facilate discussion. -->
+
 ## Description

.github/ISSUE_TEMPLATE/feature_request.md

@@ -6,15 +6,19 @@ title: "<Replace this with actual title>"
 ---
 
 ## Problem
+
 <!-- Describe a problem solved by this feature; or delete the section entirely. -->
 
 ## Description
+
 <!-- Describe the feature and how it solves the problem. -->
 
 ## Alternatives
+
 <!-- Describe any alternative solutions or features you have considered. How is this feature better? -->
 
 ## Additional context
+
 <!-- Add any other context about the feature here; or delete the section entirely. -->
 
 <!-- If you would like to work on this, please comment below separately. -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,28 +1,39 @@
 ## Fixes
+
 <!-- If PR doesn't fully resolve the issue, replace 'Fixes' below with 'Related to'. -->
 <!-- If there is no issue being resolved, please consider opening one before creating this pull request. -->
+
 Fixes #[issue number] by @[issue author]
 
 ## Description
+
 <!-- Concisely describe what the pull request does. -->
 <!-- Add screenshots, videos, or other media to show the problem and the solution when appropriate. -->
 
 ## Testing Instructions
+
 <!-- Give steps for the reviewer to verify that this PR fixes the problem; or delete this section entirely. -->
 
 ## Checklist
+
 <!-- Replace  the [ ] with [x] to check the boxes. -->
-- [ ] My pull request has a descriptive title (not a vague title like `Update index.md`).
-- [ ] My pull request targets the *default* branch of the repository (`main`) or a parent feature branch.
+
+- [ ] My pull request has a descriptive title (not a vague title like
+      `Update index.md`).
+- [ ] My pull request targets the _default_ branch of the repository (`main`) or
+      a parent feature branch.
 - [ ] My commit messages follow [best practices][best_practices].
 - [ ] My code follows the established code style of the repository.
 - [ ] I added or updated tests for the changes I made (if applicable).
 - [ ] I added or updated documentation (if applicable).
-- [ ] I tried running the project locally and verified that there are no visible errors.
+- [ ] I tried running the project locally and verified that there are no visible
+      errors.
 
-[best_practices]:https://git-scm.com/book/en/v2/Distributed-Git-Contributing-to-a-Project#_commit_guidelines
+[best_practices]:
+  https://git-scm.com/book/en/v2/Distributed-Git-Contributing-to-a-Project#_commit_guidelines
 
 ## Developer Certificate of Origin
+
 <!-- You must read and understand the following attestation. -->
 
 <details>

.pre-commit-config.yaml

@@ -68,7 +68,7 @@ repos:
     hooks:
       - id: eslint
         files: ^js/.*$
-        'types': [file] # ESLint only accepts [javascript] by default.
+        "types": [file] # ESLint only accepts [javascript] by default.
         args:
           - --ignore-path=.gitignore
           - --ignore-path=.eslintignore
@@ -82,7 +82,6 @@ repos:
     rev: v2.6.0
     hooks:
       - id: prettier
-        exclude: \.md$ # TODO: https://github.com/WordPress/openverse/issues/333
         additional_dependencies:
           - [email protected]
 

.pre-commit-config.yaml.jinja

@@ -76,11 +76,11 @@ repos:
     rev: v8.15.0
     hooks:
       - id: eslint
-        files: {{ eslint_files | default('^js/.*$') }}
+        files: {{ eslint_files | default("^js/.*$") }}
         {% if eslint_exclude %}
         exclude: {{ eslint_exclude }} # ESLint raises warnings for ignored files.
         {% endif %}
-        'types': [file] # ESLint only accepts [javascript] by default.
+        "types": [file] # ESLint only accepts [javascript] by default.
         args:
           - --ignore-path=.gitignore
           - --ignore-path=.eslintignore
@@ -98,7 +98,6 @@ repos:
     rev: v2.6.0
     hooks:
       - id: prettier
-        exclude: \.md$ # TODO: https://github.com/WordPress/openverse/issues/333
         additional_dependencies:
           {% block prettier_dependencies %}
           - [email protected]