Translate code snippets

[m-aciek]

Currently code blocks aren't translatable. They often contain comments or literals, for which translating them would be natural.

For example part of tutorial:

# this is the first comment
spam = 1  # and this is the second comment
          # ... and now a third!
text = "# This is not a comment because it's inside quotes."

For example React tutorial translation localizes code blocks.

[m-aciek]

I've sent an email to doc-sig@python.org.