Duplicated colon before code in documentation

[Aclrian]

Describe the bug

See tittle

To Reproduce

1. go to #/sklearn/sklearn.preprocessing._data/PowerTransformer/inverse_transform
2. there is a '::' before each code block

Expected behavior

• Remove one of the colons
• Properly format the code block that comes after (newlines should be preserved)

Screenshots (optional)

Additional Context (optional)

Can be done by adding another replacement to api-editor/gui/src/features/packageData/selectionView/DocumentationText.tsx.

[lars-reimann]

Would generally require supporting more features of reStructuredText, in this case literal code blocks.