Just because I spent way too much time and managed to get under 150, to 147

for($x=-1;$x<1;$x+=.05){for($y=-2.3;$y<.7;$y+=.05){$i=$y;$j=$x;$k=99;
while($j<4&&--$k){($i,$j)=($i*$i-$j*$j+$y,2*$i*$j+$x)}print$k?'+':' '}
+print$/}
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BogeyFoo