Markdown writer: Ensure that `+` and `-` are escaped properly...

so they don't cause spurious lists.  Previously they were only
if succeeded by a space, not if they were at end of line.

Closes #3773.

1 files changed, 14 insertions, 0 deletions

diff --git a/test/command/3773.md b/test/command/3773.md
new file mode 100644
index 000000000..7ee8a3941
--- /dev/null
+++ b/test/command/3773.md
@@ -0,0 +1,14 @@
+```
+% pandoc -t markdown
+A.  \#
+B.  \+
+C.  \*
+D.  o
+E.  o or \*
+^D
+A.  \#
+B.  \+
+C.  \*
+D.  o
+E.  o or \*
+```