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Wrapping the example matrix with outer array (#1057)

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	`1`	`+import { islands } from '../NumberOfIslands'`
	`2`	`+`
	`3`	`+describe('Number of Islands', () => {`
	`4`	`+ test('Graph with three islands', () => {`
	`5`	`+ const graph = [`
	`6`	`+ ['1', '1', '0', '0', '0'],`
	`7`	`+ ['1', '1', '0', '0', '0'],`
	`8`	`+ ['0', '0', '1', '0', '0'],`
	`9`	`+ ['0', '0', '0', '1', '1']`
	`10`	`+ ]`
	`11`	`+ expect(islands(graph)).toBe(3)`
	`12`	`+ })`
	`13`	`+`
	`14`	`+ test('Graph with only one island', () => {`
	`15`	`+ const graph = [`
	`16`	`+ ['1', '1'],`
	`17`	`+ ['1', '1'],`
	`18`	`+ ['0', '0'],`
	`19`	`+ ['0', '0']`
	`20`	`+ ]`
	`21`	`+ expect(islands(graph)).toBe(1)`
	`22`	`+ })`
	`23`	`+`
	`24`	`+ test('No islands', () => {`
	`25`	`+ const graph = [`
	`26`	`+ ['0', '0'],`
	`27`	`+ ['0', '0']`
	`28`	`+ ]`
	`29`	`+ expect(islands(graph)).toBe(0)`
	`30`	`+ })`
	`31`	`+})`

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