Update issue templates

Author: mdwint

.github/ISSUE_TEMPLATE/formatting-bug.md

@@ -0,0 +1,48 @@
+---
+name: Formatting bug
+about: Report a bug in the formatting logic
+title: ''
+labels: bug
+assignees: mdwint
+
+---
+
+## Describe the bug
+
+<!--
+Provide a clear and concise description of what the bug is.
+-->
+
+
+## Reproducible example
+
+<!--
+Provide a changelog that triggers the bug. Try to reduce this example to its essence.
+-->
+
+### Input changelog
+
+```markdown
+# Changelog
+...
+```
+
+### Error message (if applicable)
+
+```
+ERROR: ...
+```
+
+### Actual (wrong) output
+
+```markdown
+# Changelog
+...
+```
+
+### Expected output
+
+```markdown
+# Changelog
+...
+```

.github/ISSUE_TEMPLATE/formatting-enhancement.md

@@ -0,0 +1,35 @@
+---
+name: Formatting enhancement
+about: Request an enhancement to the formatter
+title: ''
+labels: enhancement
+assignees: mdwint
+
+---
+
+## Describe the enhancement
+
+<!--
+Provide a clear and concise description of what you want to happen.
+-->
+
+
+## Example
+
+<!--
+Provide a changelog to be formatted. Try to reduce this example to its essence.
+-->
+
+### Input changelog
+
+```markdown
+# Changelog
+...
+```
+
+### Expected output
+
+```markdown
+# Changelog
+...
+```