Description:
Inserting text into cells which contains tab character ('\t') persists at the cells (can be used for formatting, or simply as part of text) for as long as document is opened.
After closing and opening document all tab characters at text cells are replaced by spaces (' ').

Copy-pasting text with tabs and using it for formatting is frequent operation and this character should not be removed, and actually it should be invalid behavior to modify content of text cells - it is expected to get data which was entered into cells.

Steps to Reproduce:
1. Copy text with tab character from text editor and insert into cell (preferably at start of text so it will be immediately noticed).
2. Save and close document.
3. Open document.

Actual Results:
Text at the cell contains spaces instead of tab characters.

Expected Results:
Text at text cells is not modified.


Reproducible: Always


User Profile Reset: No



Additional Info: