test: remove literal error messages

test: remove literal error messages · nodejs/node@f8bc5ab

Original file line number	Diff line number	Diff line change
`@@ -38,13 +38,11 @@ deflater.on('drain', function() {`
`38`	`38`
`39`	`39`	`process.once('exit', function() {`
`40`	`40`	`assert.strictEqual(`
`41`		`-beforeFlush, true,`
`42`		`-'before calling flush, writable stream should need to drain');`
	`41`	`+beforeFlush, true);`
`43`	`42`	`assert.strictEqual(`
`44`		`-afterFlush, false,`
`45`		`-'after calling flush, writable stream should not need to drain');`
	`43`	`+afterFlush, false);`
`46`	`44`	`assert.strictEqual(`
`47`		`-drainCount, 1, 'the deflater should have emitted a single drain event');`
	`45`	`+drainCount, 1);`
`48`	`46`	`assert.strictEqual(`
`49`		`-flushCount, 2, 'flush should be called twice');`
	`47`	`+flushCount, 2);`
`50`	`48`	`});`