Fix bug in `blame`.

[1uc]

Since the codeprinter often writes to the stream directly, blame isn't run when needed.

This commit ensures that CodePrinter always writes via add_text.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.17%. Comparing base (4f9d101) to head (ad00b79).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1180 +/- ## ========================================== - Coverage 87.17% 87.17% -0.01% ========================================== Files 175 175 Lines 12885 12884 -1 ========================================== - Hits 11233 11232 -1 Misses 1652 1652 ```

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