[BUG]: If raw text = cleaned text, app crashes

[Kostis-S-Z]

Description

If there is no cleaning to be done in the input text of the document, the app crashes.

Reproduction

1. Run demo app
2. Create empty file file.md and inside write This is an example
3. Upload file to app
4. Crash

Relevant log output

DuplicateWidgetID: There are multiple identical st.text_area widgets with the same generated key.

When a widget is created, it's assigned an internal key based on its structure. Multiple widgets with an identical structure will result in the same internal key, which causes this error.

To fix this error, please pass a unique key argument to st.text_area.
Traceback:

File "/.../demo/app.py", line 81, in <module>
    st.text_area(f"Total Length: {len(clean_text)}", f"{clean_text[:500]} . . .")

Expected behavior

Not to crash

System Info

• OS: Ubuntu
• Branch: main

Have you searched for similar issues before submitting this one?

• Yes, I have searched for similar issues