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pandoc-3.0: test/command/8511.md

# Conversion of icon-like sequences followed by alphanum char
## to Jira
```
% pandoc -t jira
:P :P_ :PA :Pa :P2
^D
\:P \:P\_ :PA :Pa :P2
```

## from jira
```
% pandoc -f jira -t markdown
\:PA
^D
\\:PA
```