Include_sections (Include_sections)

`module type Something = sig ... end`

A module type.

Let's include `Something` once

## Something 1

foo

### Something 2

## Something 1-bis

Some text.

## Second include

Let's include `Something` a second time: the heading level should be shift here.

### Something 1

foo

#### Something 2

### Something 1-bis

Some text.

### Third include

Shifted some more.

#### Something 1

foo

##### Something 2

#### Something 1-bis

Some text.

And let's include it again, but without inlining it this time: the ToC shouldn't grow.

`include Something`
`val something : unit`

## Something 1

foo

`val foo : unit`

### Something 2

`val bar : unit`

foo bar

## Something 1-bis

Some text.