Fix coding style

Author: loilo

src/ln.js

@@ -36,7 +36,7 @@ function _ln(options, source, dest) {
   dest = path.resolve(process.cwd(), String(dest));
 
   if (fs.existsSync(dest) && common.statFollowLinks(dest).isDirectory(dest)) {
-    dest = path.resolve(dest, path.basename(sourcePath))
+    dest = path.resolve(dest, path.basename(sourcePath));
   }
 
   if (fs.existsSync(dest)) {

test/ln.js

@@ -50,7 +50,7 @@ test('destination already exists', t => {
 
 test('destination already exists inside directory', t => {
   shell.cd(t.context.tmp);
-  let result = shell.ln('-s', 'file1', './');
+  const result = shell.ln('-s', 'file1', './');
   t.truthy(shell.error());
   t.is(result.code, 1);
   shell.cd('..');
@@ -147,7 +147,7 @@ test('To current directory', t => {
 
 test('Inside existing directory', t => {
   shell.cd(t.context.tmp);
-  let result = shell.ln('-s', 'external/node_script.js', './');
+  const result = shell.ln('-s', 'external/node_script.js', './');
   t.is(result.code, 0);
   t.truthy(fs.existsSync('node_script.js'));
   t.is(