Provide a gallery example to show coloring of points by categories

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,32 +1,32 @@
----
-name: Bug report
-about: Report a problem/bug to help us improve
-title: ''
-labels: bug
-assignees: ''
-
----
-
-**Description of the problem**
-
-<!-- Please be as detailed as you can when describing an issue. The more information we have, the easier it will be for us to track this down. -->
-
-**Full code that generated the error**
-
-```python
-PASTE CODE HERE
-```
-
-**Full error message**
-
-```
-PASTE ERROR MESSAGE HERE
-```
-
-**System information**
-
-Please paste the output of `python -c "import pygmt; pygmt.show_versions()"`:
-
-```
-PASTE THE OUTPUT HERE
-```
+---
+name: Bug report
+about: Report a problem/bug to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Description of the problem**
+
+<!-- Please be as detailed as you can when describing an issue. The more information we have, the easier it will be for us to track this down. -->
+
+**Full code that generated the error**
+
+```python
+PASTE CODE HERE
+```
+
+**Full error message**
+
+```
+PASTE ERROR MESSAGE HERE
+```
+
+**System information**
+
+Please paste the output of `python -c "import pygmt; pygmt.show_versions()"`:
+
+```
+PASTE THE OUTPUT HERE
+```

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
-blank_issues_enabled: true
-contact_links:
-  - name: GMT Community Forum
-    url: https://forum.generic-mapping-tools.org/c/questions/pygmt-q-a
-    about: Please ask questions here or find answers to common problems.
+blank_issues_enabled: true
+contact_links:
+  - name: GMT Community Forum
+    url: https://forum.generic-mapping-tools.org/c/questions/pygmt-q-a
+    about: Please ask questions here or find answers to common problems.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,19 +1,19 @@
----
-name: Feature request
-about: Request the addition of a new feature/functionality
-title: ''
-labels: feature request
-assignees: ''
-
----
-
-**Description of the desired feature**
-
-
-
-<!-- Please be as detailed as you can in your description. If possible, include an example of how you would like to use this feature (even better if it's a code example). -->
-
-
-**Are you willing to help implement and maintain this feature?** Yes/No
-
-<!-- Every feature we add is code that we will have to maintain and keep updated. This takes a lot of effort. If you are willing to be involved in the project and help maintain your feature, it will make it easier for us to accept it. -->
+---
+name: Feature request
+about: Request the addition of a new feature/functionality
+title: ''
+labels: feature request
+assignees: ''
+
+---
+
+**Description of the desired feature**
+
+
+
+<!-- Please be as detailed as you can in your description. If possible, include an example of how you would like to use this feature (even better if it's a code example). -->
+
+
+**Are you willing to help implement and maintain this feature?** Yes/No
+
+<!-- Every feature we add is code that we will have to maintain and keep updated. This takes a lot of effort. If you are willing to be involved in the project and help maintain your feature, it will make it easier for us to accept it. -->

.github/ISSUE_TEMPLATE/release_checklist.md

@@ -1,44 +1,44 @@
----
-name: PyGMT release checklist
-about: Checklist for a new PyGMT release.
-title: Release PyGMT vX.Y.Z
-labels: maintenance
-assignees: ''
-
----
-
-**Release**: [v0.x.x](https://github.com/GenericMappingTools/pygmt/milestones/?)
-**Scheduled Date**: YYYY/MM/DD
-**Pull request due date**: YYYY/MM/DD
-
-**Priority PRs/issues to complete prior to release**
-- [ ] Wrap X ()
-- [ ] Wrap Y ()
-
-**Before release**:
-- [ ] Reserve a DOI on [Zenodo](https://zenodo.org) by clicking on "New Version"
-- [ ] Finish up 'Changelog entry for v0.x.x' Pull Request:
-  - [ ] Add a new entry in `doc/_static/version_switch.js` for documentation switcher
-  - [ ] Update citation information https://github.com/GenericMappingTools/pygmt#citing-pygmt
-  - [ ] Add the documentation link https://github.com/GenericMappingTools/pygmt#documentation-for-other-versions
-  - [ ] Add compatibility information https://github.com/GenericMappingTools/pygmt#compatibility-with-python-and-gmt-versions
-  - [ ] Copy draft changelog from Release Drafter and edit it to look nice
-
-**Release**:
-- [ ] At the [PyGMT release page on GitHub](https://github.com/GenericMappingTools/pygmt/releases):
-  - [ ] Edit the draft release notes with the finalized changelog
-  - [ ] Set the tag version and release title to vX.Y.Z
-  - [ ] Make a release by clicking the 'Publish Release' button, this will automatically create a tag too
-- [ ] Manually upload the pygmt-vX.Y.Z.zip file to https://zenodo.org/deposit, ensure that it is filed under the correct reserved DOI
-
-**After release**:
-- [ ] Update conda-forge [pygmt-feedstock](https://github.com/conda-forge/pygmt-feedstock) [Usually done automatically by conda-forge's bot]
-- [ ] Bump PyGMT version on https://github.com/GenericMappingTools/try-gmt
-- [ ] Announce the release on:
-  - [ ] GMT [forum](https://forum.generic-mapping-tools.org/c/news/)
-  - [ ] [Major/Minor releases only] GMT [website](https://github.com/GenericMappingTools/website) (News)
-  - [ ] [ResearchGate](https://www.researchgate.net/project/PyGMT-A-Python-interface-for-the-Generic-Mapping-Tools)
-
----
-
-- [ ] Party :tada: (don't tick before all other checkboxes are ticked!)
+---
+name: PyGMT release checklist
+about: Checklist for a new PyGMT release.
+title: Release PyGMT vX.Y.Z
+labels: maintenance
+assignees: ''
+
+---
+
+**Release**: [v0.x.x](https://github.com/GenericMappingTools/pygmt/milestones/?)
+**Scheduled Date**: YYYY/MM/DD
+**Pull request due date**: YYYY/MM/DD
+
+**Priority PRs/issues to complete prior to release**
+- [ ] Wrap X ()
+- [ ] Wrap Y ()
+
+**Before release**:
+- [ ] Reserve a DOI on [Zenodo](https://zenodo.org) by clicking on "New Version"
+- [ ] Finish up 'Changelog entry for v0.x.x' Pull Request:
+  - [ ] Add a new entry in `doc/_static/version_switch.js` for documentation switcher
+  - [ ] Update citation information https://github.com/GenericMappingTools/pygmt#citing-pygmt
+  - [ ] Add the documentation link https://github.com/GenericMappingTools/pygmt#documentation-for-other-versions
+  - [ ] Add compatibility information https://github.com/GenericMappingTools/pygmt#compatibility-with-python-and-gmt-versions
+  - [ ] Copy draft changelog from Release Drafter and edit it to look nice
+
+**Release**:
+- [ ] At the [PyGMT release page on GitHub](https://github.com/GenericMappingTools/pygmt/releases):
+  - [ ] Edit the draft release notes with the finalized changelog
+  - [ ] Set the tag version and release title to vX.Y.Z
+  - [ ] Make a release by clicking the 'Publish Release' button, this will automatically create a tag too
+- [ ] Manually upload the pygmt-vX.Y.Z.zip file to https://zenodo.org/deposit, ensure that it is filed under the correct reserved DOI
+
+**After release**:
+- [ ] Update conda-forge [pygmt-feedstock](https://github.com/conda-forge/pygmt-feedstock) [Usually done automatically by conda-forge's bot]
+- [ ] Bump PyGMT version on https://github.com/GenericMappingTools/try-gmt
+- [ ] Announce the release on:
+  - [ ] GMT [forum](https://forum.generic-mapping-tools.org/c/news/)
+  - [ ] [Major/Minor releases only] GMT [website](https://github.com/GenericMappingTools/website) (News)
+  - [ ] [ResearchGate](https://www.researchgate.net/project/PyGMT-A-Python-interface-for-the-Generic-Mapping-Tools)
+
+---
+
+- [ ] Party :tada: (don't tick before all other checkboxes are ticked!)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,25 +1,25 @@
-**Description of proposed changes**
-
-
-
-<!-- Please describe changes proposed and **why** you made them. If unsure, open an issue first so we can discuss.-->
-
-<!-- If fixing an issue, put the issue number after the # below (no spaces). GitHub will automatically close it when this gets merged. -->
-Fixes #
-
-
-**Reminders**
-
-- [ ] Run `make format` and `make check` to make sure the code follows the style guide.
-- [ ] Add tests for new features or tests that would have caught the bug that you're fixing.
-- [ ] Add new public functions/methods/classes to `doc/api/index.rst`.
-- [ ] Write detailed docstrings for all functions/methods.
-- [ ] If adding new functionality, add an example to docstrings or tutorials.
-
-**Slash Commands**
-
-You can write slash commands (`/command`) in the first line of a comment to perform
-specific operations. Supported slash commands are:
-
-- `/format`: automatically format and lint the code
-- `/test-gmt-dev`: run full tests on the latest GMT development version
+**Description of proposed changes**
+
+
+
+<!-- Please describe changes proposed and **why** you made them. If unsure, open an issue first so we can discuss.-->
+
+<!-- If fixing an issue, put the issue number after the # below (no spaces). GitHub will automatically close it when this gets merged. -->
+Fixes #
+
+
+**Reminders**
+
+- [ ] Run `make format` and `make check` to make sure the code follows the style guide.
+- [ ] Add tests for new features or tests that would have caught the bug that you're fixing.
+- [ ] Add new public functions/methods/classes to `doc/api/index.rst`.
+- [ ] Write detailed docstrings for all functions/methods.
+- [ ] If adding new functionality, add an example to docstrings or tutorials.
+
+**Slash Commands**
+
+You can write slash commands (`/command`) in the first line of a comment to perform
+specific operations. Supported slash commands are:
+
+- `/format`: automatically format and lint the code
+- `/test-gmt-dev`: run full tests on the latest GMT development version

.github/codecov.yml

@@ -1,14 +1,14 @@
-codecov:
-  notify:
-    require_ci_to_pass: no
-
-coverage:
-  status:
-    patch:
-      default:
-        target: '90'
-        if_no_uploads: error
-        if_not_found: success
-        if_ci_failed: failure
-
-comment: off
+codecov:
+  notify:
+    require_ci_to_pass: no
+
+coverage:
+  status:
+    patch:
+      default:
+        target: '90'
+        if_no_uploads: error
+        if_not_found: success
+        if_ci_failed: failure
+
+comment: off

.github/dependabot.yml

@@ -1,17 +1,17 @@
-# Set update schedule for GitHub Actions
-
-version: 2
-updates:
-
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      # Check for updates to GitHub Actions every weekday
-      interval: "weekly"
-      day: "tuesday"
-    # Allow up to 2 open pull requests at a time
-    open-pull-requests-limit: 2
-    # Specify labels for pull requests
-    labels:
-      - "maintenance"
-      - "skip-changelog"
+# Set update schedule for GitHub Actions
+
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every weekday
+      interval: "weekly"
+      day: "tuesday"
+    # Allow up to 2 open pull requests at a time
+    open-pull-requests-limit: 2
+    # Specify labels for pull requests
+    labels:
+      - "maintenance"
+      - "skip-changelog"

.github/release-drafter.yml

@@ -1,38 +1,38 @@
-name-template: 'v$RESOLVED_VERSION'
-tag-template: 'v$RESOLVED_VERSION'
-version-resolver:
-  minor:
-    labels:
-      - 'feature'
-  default: patch
-categories:
-  - title: 'New Features'
-    label: 'feature'
-  - title: 'Enhancements'
-    label: 'enhancement'
-  - title: 'Deprecations'
-    label: 'deprecation'
-  - title: 'Bug Fixes'
-    label: 'bug'
-  - title: 'Documentation'
-    label: 'documentation'
-  - title: 'Maintenance'
-    label: 'maintenance'
-exclude-labels:
-  - 'skip-changelog'
-category-template: '### $TITLE'
-change-template: '* $TITLE ([#$NUMBER]($URL))'
-template: |
-  ## Release v$NEXT_PATCH_VERSION (20YY/MM/DD)
-
-  [![Digital Object Identifier for PyGMT v$NEXT_PATCH_VERSION](https://zenodo.org/badge/DOI/10.5281/zenodo.3781524.svg)](https://doi.org/10.5281/zenodo.3781524)
-
-  ### Highlights
-
-  *
-
-  $CHANGES
-
-  ### Contributors
-
-  $CONTRIBUTORS
+name-template: 'v$RESOLVED_VERSION'
+tag-template: 'v$RESOLVED_VERSION'
+version-resolver:
+  minor:
+    labels:
+      - 'feature'
+  default: patch
+categories:
+  - title: 'New Features'
+    label: 'feature'
+  - title: 'Enhancements'
+    label: 'enhancement'
+  - title: 'Deprecations'
+    label: 'deprecation'
+  - title: 'Bug Fixes'
+    label: 'bug'
+  - title: 'Documentation'
+    label: 'documentation'
+  - title: 'Maintenance'
+    label: 'maintenance'
+exclude-labels:
+  - 'skip-changelog'
+category-template: '### $TITLE'
+change-template: '* $TITLE ([#$NUMBER]($URL))'
+template: |
+  ## Release v$NEXT_PATCH_VERSION (20YY/MM/DD)
+
+  [![Digital Object Identifier for PyGMT v$NEXT_PATCH_VERSION](https://zenodo.org/badge/DOI/10.5281/zenodo.3781524.svg)](https://doi.org/10.5281/zenodo.3781524)
+
+  ### Highlights
+
+  *
+
+  $CHANGES
+
+  ### Contributors
+
+  $CONTRIBUTORS