fix: crash on inline comments. Closes #114 (#115)

* Fix crash on inline comments. Closes #114

* chore: use slice for consistency

Author: jwilsson

lib/nodes/inline-comment.js

@@ -1,6 +1,6 @@
 module.exports = {
   isInlineComment(token) {
-    if (token[0] === 'word' && token[1] === '//') {
+    if (token[0] === 'word' && token[1].slice(0, 2) === '//') {
       const first = token;
       const bits = [];
       let last;

test/parser/comments.test.js

@@ -15,6 +15,18 @@ test('inline comment', (t) => {
   t.is(nodeToString(root), less);
 });
 
+test('inline comment without leading space', (t) => {
+  const less = '//batman';
+  const root = parse(less);
+  const { first } = root;
+
+  t.truthy(root);
+  t.true(first instanceof Comment);
+  t.true(first.inline);
+  t.is(first.text, 'batman');
+  t.is(nodeToString(root), less);
+});
+
 test('close empty', (t) => {
   const less = '// \n//';
   const root = parse(less);