Fix MagpieTTS_ModelInference process_text: str.replace() doesn't modify in-place

[matteolippi]

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What does this PR do ?

Fixes a bug in the process_text method of MagpieTTS_ModelInference where str.replace() was being called without capturing the return value, making text normalization ineffective.

Collection: TTS

Changelog

• Fixed lines 1114-1115 in nemo/collections/tts/models/magpietts.py to assign the return values of str.replace() calls back to single_space_text
• This ensures that the text normalization for "h t t p" → "http" and "w w w" → "www" actually takes effect during ASR transcript processing

Usage

No usage changes - this is an internal bug fix that makes existing functionality work as intended.

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For TTS changes: @blisc or @okuchaiev

Additional Information

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[blisc]

Thanks for the bugfix! Let me fix it in #15010 since we moved the post-training classes to a different file.

[matteolippi]

Thanks for the bugfix! Let me fix it in #15010 since we moved the post-training classes to a different file.

No worries! In case I have other contributions, should I send the PR straight to magpietts_main?

[blisc]

Thanks for the bugfix! Let me fix it in #15010 since we moved the post-training classes to a different file.

No worries! In case I have other contributions, should I send the PR straight to magpietts_main?

We plan to merge #15031 soon. Please send the PR to main branch after we merge.

[matteolippi]

perfect, thanks!