Exporting a cell array whose dots were replaced by commas, results in added quotation marks

I have strings in a cell array, I would like to replace dots with commas and then export it in a text file.

The following code

str={'This. is a test'}
writecell(str','test')

generates a txt file containing

This. is a test

while the following

str={'This. is a test'}
str=strrep(str,'.',',')
writecell(str','test')

generates a txt file containing

"This, is a test"

why are quotation marks " added? And how to remove them?

Answer 1

[Ameer Hamza]

Change to this line

writecell(str','test', 'QuoteStrings', false)