Added the doctests - Contributes to #9943 · TheAlgorithms/Python@aae7627

matrix/count_islands_in_matrix.py:45:89: E501 Line too long (94 > 88)

matrix/count_islands_in_matrix.py:38:1: W293 Blank line contains whitespace

matrix/count_islands_in_matrix.py:24:89: E501 Line too long (89 > 88)

matrix/count_islands_in_matrix.py:23:12: W291 Trailing whitespace

matrix/count_islands_in_matrix.py:20:1: W293 Blank line contains whitespace

matrix/count_islands_in_matrix.py:13:1: W293 Blank line contains whitespace

matrix/count_islands_in_matrix.py:12:14: W291 Trailing whitespace

matrix/count_islands_in_matrix.py:11:1: W293 Blank line contains whitespace

matrix/count_islands_in_matrix.py:9:89: E501 Line too long (90 > 88)

matrix/count_islands_in_matrix.py:8:89: E501 Line too long (89 > 88)

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