Work around problems related to markdown-it-texmath plugin's token.map not accounting for math_block_end.

helpers/helpers.js

@@ -271,6 +271,14 @@ module.exports.flattenLists = function flattenLists(params) {
   const nestingStack = [];
   let lastWithMap = { "map": [ 0, 1 ] };
   params.tokens.forEach(function forToken(token) {
+    if (
+      (token.type === "math_block") &&
+      (token.tag === "math") &&
+      token.map[1]
+    ) {
+      // markdown-it-texmath package does not account for math_block_end
+      token.map[1]++;
+    }
     if ((token.type === "bullet_list_open") ||
         (token.type === "ordered_list_open")) {
       // Save current context and start a new one

test/markdownlint-test.js

@@ -1473,6 +1473,21 @@ $$\n`
   });
 });
 
+tape("texmath-content-in-lists with texmath plugin", (test) => {
+  test.plan(2);
+  markdownlint({
+    "files": [ "./test/texmath-content-in-lists.md" ],
+    "markdownItPlugins": [ [ pluginTexMath, pluginTexMathOptions ] ]
+  }, function callback(err, actual) {
+    test.ifError(err);
+    const expected = {
+      "./test/texmath-content-in-lists.md": []
+    };
+    test.deepEqual(actual, expected, "Unexpected issues.");
+    test.end();
+  });
+});
+
 tape("getVersion", (test) => {
   test.plan(1);
   const actual = markdownlint.getVersion();

test/texmath-content-in-lists.md

@@ -0,0 +1,67 @@
+# texmath-content-in-lists
+
+Text
+
+- Item
+  $$
+  e = mc^2
+  $$
+
+Text
+
+- Item
+
+  $$
+  e = mc^2
+  $$
+
+Text
+
+- Item
+
+  $$
+  e = mc^2
+  e = mc^2
+  $$
+
+Text
+
+- Item
+
+  $$
+  $$
+
+Text
+
+- Item
+
+- Item
+
+  $$
+  e = mc^2
+  $$
+
+- Item
+
+Text
+
+- $$
+  e = mc^2
+  $$
+
+Text
+
+- $e = mc^2$
+
+Text
+
+- Item
+- $e = mc^2$
+
+Text
+
+- Item
+- $e = mc^2$
+- Item
+
+Text