header 1 | header 2
-------- | --------
cell 1.1 | cell 1.2
cell 2.1 | cell 2.2

---

header 1 | header 2
:------- | --------
cell 1.1 | cell 1.2
cell 2.1 | cell 2.2

---

header 1
:-------
cell 1.1
cell 2.1

---

header 1
-------|
cell 1.1
cell 2.1

---

Not a table, we haven't ended the paragraph:
header 1 | header 2
-------- | --------
cell 1.1 | cell 1.2
cell 2.1 | cell 2.2