fixup! Fix one parser test

Author: mdbrnowski

tests/parser/input_1.txt

@@ -2,9 +2,9 @@ A = zeros(5);  # 3x3 matrix filled with zeros
 B = ones(5);   # 3x3 matrix filled with ones
 C = eye(5);   # 3x3 diagonal matrix filled with ones
 D = A.+B;     # add element-wise
-E -= A.-B;    # substract element-wise
-F *= A.*B;    # multiply element-wise
-G /= A./B;    # divide element-wise
+E = A.-B;    # substract element-wise
+F = A.*B;    # multiply element-wise
+G = A./B;    # divide element-wise
 
 H = [ [ 1, 2, 3], [ 4, 5, 6], [ 7, 8, 9] ];