Fix space/useTabs conflict message (#327)

Author: pvdlg

lib/options-manager.js

@@ -129,8 +129,8 @@ const mergeWithPrettierConf = (opts, prettierOpts) => {
 		throw new Error(`The Prettier config \`semi\` is ${prettierOpts.semi} while XO \`semicolon\` is ${opts.semicolon}`);
 	}
 
-	if (((opts.space === true || typeof opts.space === 'number') && prettierOpts.useTabs === false) ||
-		((opts.space === false || typeof opts.space === 'number') && prettierOpts.useTabs === true)) {
+	if (((opts.space === true || typeof opts.space === 'number') && prettierOpts.useTabs === true) ||
+		((opts.space === false) && prettierOpts.useTabs === false)) {
 		throw new Error(`The Prettier config \`useTabs\` is ${prettierOpts.useTabs} while XO \`space\` is ${opts.space}`);
 	}
 

test/options-manager.js

@@ -279,13 +279,12 @@ test('mergeWithPrettierConf: throw error is `semi`/`semicolon` conflicts', t =>
 });
 
 test('mergeWithPrettierConf: throw error is `space`/`useTabs` conflicts', t => {
-	t.throws(() => manager.mergeWithPrettierConf({space: true}, {useTabs: false}));
-	t.throws(() => manager.mergeWithPrettierConf({space: 4}, {useTabs: false}));
-	t.throws(() => manager.mergeWithPrettierConf({space: 0}, {useTabs: false}));
-	t.throws(() => manager.mergeWithPrettierConf({space: false}, {useTabs: true}));
+	t.throws(() => manager.mergeWithPrettierConf({space: false}, {useTabs: false}));
+	t.throws(() => manager.mergeWithPrettierConf({space: true}, {useTabs: true}));
 
-	t.notThrows(() => manager.mergeWithPrettierConf({space: false}, {useTabs: false}));
-	t.notThrows(() => manager.mergeWithPrettierConf({space: true}, {useTabs: true}));
+	t.notThrows(() => manager.mergeWithPrettierConf({space: 4}, {useTabs: false}));
+	t.notThrows(() => manager.mergeWithPrettierConf({space: true}, {useTabs: false}));
+	t.notThrows(() => manager.mergeWithPrettierConf({space: false}, {useTabs: true}));
 });
 
 test('mergeWithPrettierConf: throw error is `space`/`tabWidth` conflicts', t => {