markdownlint/doc-build/md003.md

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Markdown

This rule is triggered when different heading styles (atx, setext, and 'closed'
atx) are used in the same document:
```markdown
# ATX style H1
## Closed ATX style H2 ##
Setext style H1
===============
```
Be consistent with the style of heading used in a document:
```markdown
# ATX style H1
## ATX style H2
```
The setext_with_atx and setext_with_atx_closed doc styles allow atx-style
headings of level 3 or more in documents with setext style headings:
```markdown
Setext style H1
===============
Setext style H2
---------------
### ATX style H3
```
Note: the configured heading style can be a specific style to use (atx,
atx_closed, setext, setext_with_atx, setext_with_atx_closed), or simply require
that the usage is consistent within the document.
Rationale: Consistent formatting makes it easier to understand a document.