gh-97709: Included newline separator in Mandelbrot set (GH-97737)

Included newline separator in Mandelbrot set

Now the Mandelbrot set one-liner example on separates the lines with a '\n' character.
(cherry picked from commit 4980260)

Co-authored-by: matheusja <matheusjahnke@hotmail.com>

Doc/faq/programming.rst

@@ -735,7 +735,7 @@ Is it possible to write obfuscated one-liners in Python?
 --------------------------------------------------------
 
 Yes.  Usually this is done by nesting :keyword:`lambda` within
-:keyword:`!lambda`.  See the following three examples, due to Ulf Bartelt::
+:keyword:`!lambda`.  See the following three examples, slightly adapted from Ulf Bartelt::
 
    from functools import reduce
 
@@ -748,7 +748,7 @@ Yes.  Usually this is done by nesting :keyword:`lambda` within
    f(x,f), range(10))))
 
    # Mandelbrot set
-   print((lambda Ru,Ro,Iu,Io,IM,Sx,Sy:reduce(lambda x,y:x+y,map(lambda y,
+   print((lambda Ru,Ro,Iu,Io,IM,Sx,Sy:reduce(lambda x,y:x+'\n'+y,map(lambda y,
    Iu=Iu,Io=Io,Ru=Ru,Ro=Ro,Sy=Sy,L=lambda yc,Iu=Iu,Io=Io,Ru=Ru,Ro=Ro,i=IM,
    Sx=Sx,Sy=Sy:reduce(lambda x,y:x+y,map(lambda x,xc=Ru,yc=yc,Ru=Ru,Ro=Ro,
    i=i,Sx=Sx,F=lambda xc,yc,x,y,k,f=lambda xc,yc,x,y,k,f:(k<=0)or (x*x+y*y