Text normalization
This pull request **introduces 6 alerts** and **fixes 1** when merging af4278cd307544343b466d80f681f939f41d7a3e into df360cd3c856c645d23505305ee8b689636b2dd1 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-976deade5b08d9a975c92bc6433f92edeaf9f4ab)

**new alerts:**

* 3 for Except block handles &#39;BaseException&#39;
* 3 for Unused import

**fixed alerts:**

* 1 for Except block handles &#39;BaseException&#39; This pull request **introduces 1 alert** when merging 9ed7a43b4919facffeee454d1fe3ff26bc182d17 into 9ea071605034f9f56db9b677eb1fe54fdee2b820 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-798486a6838f30a2b5a1dd7ef2a11ee73916b0c5)

**new alerts:**

* 1 for Unused import