Description:
------------
exec() gives the following results when working with files containing spaces *and* parentheses/brackets on Linux:

If the filename to be passed by the exec() function is enclosed in quotes "..." (to handle the spaces) then the backslashes are added before the following symbols:
( ) [ ] { }
and possibly before some other ones I haven't discovered.



Reproduce code:
---------------
1. exec ("touch \"Testfile without parentheses.txt\"");

2. exec ("touch Now_without_spaces_(but_with_parenteses)");

3. exec ("touch \"Now both spaces (and parentheses)\");





Expected result:
----------------
1. Creating file:
Testfile without parentheses.txt

2. Creating file:
Now_without_spaces_(but_with_parentheses)

3. Creating file:
Now both spaces (and parentheses)

Actual result:
--------------
1. Creating file:
Testfile without parentheses.txt

2. Creating file:
Now_without_spaces_(but_with_parentheses)

3. Creating file:
Now both spaces \(and parentheses\)