bug#46328: 28.0.50; csv-transpose replaces field delimiters in quoted fields with newlines

[Filipp Gunbin]

csv-mode 1.14 from elpa.  Both csv-separators and csv-field-quotes have
default values.

Create a new csv file with this single line:

--8<---------------cut here---------------start------------->8---
description,"a line, with comma, and another comma"
--8<---------------cut here---------------end--------------->8---

C-c C-t transforms this to:

--8<---------------cut here---------------start------------->8---
description
"a line
 with comma
 and another comma"
--8<---------------cut here---------------end--------------->8---

The commas inside a (quoted) field were replaced by newlines, this looks
like a bug.

Thanks.

In GNU Emacs 28.0.50 (build 3, x86_64-apple-darwin20.2.0, NS appkit-2022.20 
Version 11.1 (Build 20C69))
 of 2021-02-05 built on fgunbin.local
Repository revision: f00afb9bb8b5356690e2a785d14aa89995c96f50
Repository branch: master
System Description:  macOS 11.1