<!--- Provide a general summary of the issue in the Title above -->

## Expected Behavior

<!---
If you're describing a bug, describe what should happen.
If you're suggesting a change/improvement, explain how it should work.
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## Actual Behavior

<!---
If describing a bug, explain what happens instead of the expected behavior.
If suggesting a change/improvement, explain the difference from current behavior.
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## Steps to Reproduce

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Ensure that the issue is reproducible using `emacs -Q`.
For example, you might try running Emacs like so:

    emacs -Q --load path/to/markdown-mode.el test-case.md
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1. Step A
2. Step B
3. Step C

## Backtrace

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M-x toggle-debug-on-error.
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## Software Versions

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Examples:

- Markdown Mode: From Git on 2017-10-17, 2.4-dev, or 2.3
- Emacs: 25.3.2
- OS: macOS High Sierra
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- Markdown Mode: 
- Emacs: 
- OS: 
