Most of these are of the form `\[T]\` -> `[T]` as brackets don't need to
be escaped inside backticks.
A few instances are code outside of backticks, which python-markdown
handles very inconsistently-- here just adding backticks helps.
I think the rendering problems in #3220 are due to a quirk of the python
Markdown implementation, and I think this can be avoided by putting a
blank line before the table begins.
Eric Seppanen