Previously, recognition of escaped alert markers such as `\[!NOTE\]`
accidentally depended on enabling the optional `inline-parentheses` math
setting, resulting in such escaped alerts not rendering properly.
Goldmark splits the escaped marker differently based on the setting
being enabled or disabled, and only one form was handled. This commit
handles both forms.
For example, in a README or issue:
```
> \[!NOTE\]
> text
```
Before this commit, we'd get an ordinary blockquote displaying literal
`[!NOTE]` followed by `text`. With this commit, we get the styled
admonition.
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Enable [`forcetypeassert`](https://github.com/gostaticanalysis/forcetypeassert)
linter to prevent unchecked type assertions. ~650 issues fixed, most
fixes were clean, some use `setting.PanicInDevOrTesting`.
The only behaviour changes are where code would previously send a 500 error
or panic, a 4xx error is now emitted.
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Remove unmaintainable sanitizer rules. No need to add special "class"
regexp rules anymore, use RenderInternal.SafeAttr instead, more details
(and examples) are in the tests
