Markdown writer: handle math right before digit.

We insert an HTML comment to avoid a `$` right before
a digit, which pandoc will not recognize as a math delimiter.

1 files changed, 6 insertions, 0 deletions

diff --git a/test/command/7058.md b/test/command/7058.md
new file mode 100644
index 000000000..69e5dd445
--- /dev/null
+++ b/test/command/7058.md
@@ -0,0 +1,6 @@
+```
+% pandoc -f latex -t markdown
+5\(-\)8 \(x\)
+^D
+5$-$`<!-- -->`{=html}8 $x$
+```