fix: typo (extra `^`) in scientific notation explanation

Update contactUrl

Fix URL

Revert back to deploy on master only

Remove Romanian translation (abandoned)

The Romanian language translation that I started years ago was abandoned. Removing this because I get contacted about it frequently.

Add link to Real Python on editor

Fix typo

Fix sentence grammar

Thanks to John Thomas.

Remove whitespace to fix header rendering

Thanks to Jeremy (jmason)!

fix typo