Fixed the indentation of two code blocks
minor #3925 Fixed the indentation of two code blocks (javiereguiluz)

This PR was merged into the 2.3 branch.

Discussion
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Fixed the indentation of two code blocks

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3+
| Fixed tickets | -

Commits
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c8dbda9 Fixed the indentation of two code blocks