Fix regex parsing with slashes (#53)

Author: lydell

Diff for: index.coffee

@@ -16,9 +16,9 @@ RegularExpressionLiteral = ///
       |
       \\.
     )*
-    \]
+    \]?
     |
-    [^ / \\ \n \r \u2028 \u2029 ]+
+    [^ / [ \\ \n \r \u2028 \u2029 ]+
     |
     \\.
   )*

Diff for: test/index.test.js

@@ -809,6 +809,11 @@ describe("Token", () => {
     match("/[\\]/]/");
     match("/[\\\\]/]/", "/[\\\\]/");
     match("/[\\\\\\]/]/");
+    match("/a[/]/");
+    match("/a[\\]]/");
+    match("/a[\\]/]/");
+    match("/a[\\\\]/]/", "/a[\\\\]/");
+    match("/a[\\\\\\]/]/");
     match("/abc]xyz/", "/abc]xyz/");
     match("/\\u05aF/");
     match("/invalid escape sequence is OK: \\u/");