Block code does not use mono spaced font (inline code does however)

[g466a]

Actual Behavior:

• block code using triple backspace shows a block like it should
• highlighting works
• the font is NOT mono spaced

Expected Behavior:

• block code using triple backspace shows a block like it should
• highlighting works
• the font IS mono spaced

Steps to reproduce:

• Start Markdown.AvaloniaDemo (stable or master)
• Scroll down to the block code

What that means for my use case:

• I am building a flash card learning program

• The cards content is md, drawn using Markdown.Avalonia

• One type of card is used to learn guitar tabs and chords, as a type of ascii art
  

• Hint: the tabs can get much more complicated and its impossible to read the tabs in that case - in the above example it does not seem to be a big issue

• The tabs and chords are drawn in ascii representation

• The tabs and chords are impossible to use without mono spaced fonts

Workaround:

• use single backspace quote, aka inline code
• problem: looks ugly in this case (background grey very irregular)

[whistyun]

v11.0.0-a8 and v0.10.13 fix this issue.

Code blocks with or without syntax highlighting have monospaced font.

input:

```c
#include <stdio.h>
int main();
```

```
#include <stdio.h>
int main();
```

Output: