At time you may have a file ( mostly tab separated values files like csv files) which you want to edit to replace the tab separations by spaces or (,) comma.
You can do so using Text Editors like notepad++ using Find and Replace option using regular expressions.
How-to-do-it Steps :
1. Open the file in Notepad++
2. Press Ctrl + F to open Find Box. Select Replace tab. Add /t to Find what field and a space or a comma (,) as per what's your need to the Replace with filed.
Note : See to it that Search mode is selected as Extended
3. Click on Replace All. All tabs will be replaced by spaces/comma's.