fix syntax issues

src/test.md

@@ -10,14 +10,14 @@ Which contains some inline math $x=1$ or an equation style math $$\int_0^1 dx f(
 
 This contains and example [see the Admonition page for other styles](https://squidfunk.github.io/mkdocs-material/extensions/admonition/)
 
-!!! solution Example 1
+!!! check "Example 1"
     Let us try to solve $x=y$. For this we need to ...
 
 
 The fun thing is we can also use a similar notation to have optional information that is
 hidden:
 
-??? info Some really complicated math problem
+??? info "Some really complicated math problem"
 
     ## header