Escape character ignored in table

[rchisholm]

In a markdown table cell, the escape character to use | is ignored.

The table that should render like this:

col1	col2	col3
yes|no	maybe	sometimes

Instead renders like this:

col1	col2	col3
yes\	no	maybe

...but with an extra cell after the second row.

To reproduce, place this code in the editable markdown input:

| col1 | col2 | col3 |
| --- | --- | --- |
| yes\|no | maybe | sometimes |