Describe the issue linked to the documentation

Some of the inverse_transform methods take Xt as an argument whereas others take X. Is there are reason for the differences in the names?

Noting the cases here: https://github.com/search?q=repo%3Ascikit-learn%2Fscikit-learn%20%22def%20inverse_transform%22&type=code

Suggest a potential alternative/fix

Stick to Xt in all cases