Markdown task lists don't work properly with uppercase "X"

[mooror]

• Gitea version (or commit ref): 1.11.3
• Git version: 2.7.4
• Operating system: Linux Mint (Ubuntu 16.04.6 LTS)
• Database:
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (https://try.gitea.io/admonish/markdown-checkbox-bug-test/issues)
  • No
  • Not relevant
• Log gist: N/A

Description

Background information

When using markdown's task list feature (e.g. * [ ] Task name) in Gitea issues you can use an upper or lowercase "x" to mark tasks as complete.

The Problem

Currently, if you use an uppercase "x" (e.g. * [X] Task name) the item will be checked in the issue itself but when you view the issues list instead of seeing a a completed item you will see one less item in the list.

Let me explain, in the screenshot below you can see two issues. Each issue has the exact same list of 5 todo items, but one uses an uppercase "x" (e.g. * [X] Task name) and the other a lowercase "x" (e.g. * [x] Task name). But in the list view you can see one shows 1/5 complete ( which is correct) while the other shows 0/4 complete (not correct)

Screenshots

[mooror]

Thanks guys for the quick fix