[BUG] [ox-odt] Added leading spaces

[Damien Cassou]

Hi,

in commit bb40848458512fc26ffa47d20807e3cd0211ccad (first released with
9.6), Ihor fixed a bug in ox-odt reported by András. This fix changed
the behavior of this code:

    (let* ((src "    a")
           (dest (org-odt-plain-text src nil)))
      (message
       "%S length-src=%d length-dest=%d"
       dest (length src) (length dest)))

Results are:

- before commit: "    a" length-src=5 length-dest=5
- after commit:  "        a" length-src=5 length-dest=9

After the commit, the result of `org-odt-plain-text` contains 4 more
leading spaces. Is that the expected behavior or is that a bug?

Best

-- 
Damien Cassou

"Success is the ability to go from one failure to another without
losing enthusiasm." --Winston Churchill