Alt text wrapped in grave marks is deleted

[moshemoshe137]

Describe the bug

Alt text wrapped in grave marks is deleted.

Reproduce the bug

For example, the word "Box" is removed by mdformat

-![Stack and heap with a `Box`](images/image-2.png) Now there is just a single array.
+![Stack and heap with a ](images/image-2.png) Now there is just a single array.

List your environment

Python 3.10 on Windows.

> pip list
Package              Version
-------------------- -------
linkify-it-py        2.0.2
markdown-it-py       2.2.0
mdformat             0.7.17
mdformat_footnote    0.1.1
mdformat_frontmatter 2.0.1
mdformat-gfm         0.3.5
mdformat_tables      0.4.1
mdit-py-plugins      0.3.5
mdurl                0.1.2
pip                  23.2.1
ruamel.yaml          0.17.32
ruamel.yaml.clib     0.2.7
setuptools           68.2.2
tomli                2.0.1
uc-micro-py          1.0.2

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[hukkin]

Thanks a lot! I can reproduce even without any mdformat plugins. This needs to be fixed.