Indentation is lost when formatting tables and code spans containing column delimiters are not handled correctly

[rbolsius]

I have run across two issues when formatting tables.

1. If the table is part of a list and is indented, the indentation is lost when formatting the table.
2. If the table contains a code span that includes a pipe character (|), the pipe within the code span is treated as a column separator.

The example Markdown below illustrates both of these issues.

1. Indented table:

    |   one | two                        |
    | ----: | -------------------------- |
    |     1 |                            |
    |    12 | abc \| def                 |
    |   123 | abc `|` def                |
    |  1234 | ``double | ` backtick``    |
    | 12345 | ```triple | `` backtick``` |

When this table is formatted the indentation is lost and the second column is split into two columns:

1. Indented table:

|   one | two        |                |
| ----: | ---------- | -------------- |
|     1 |            |                |
|    12 | abc \| def |                |
|   123 | abc `      | ` def          |
|  1234 | ``double   | ` backtick``   |
| 12345 | ```triple  | `` backtick``` |