doc: Remove backslashes in doctest grammar docs (GH-29346)

(cherry picked from commit 22860dbbc8)

Co-authored-by: George Zhang <geetransit@gmail.com>
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Miss Islington (bot) 2022-11-26 22:46:33 -08:00 committed by GitHub
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@ -696,10 +696,10 @@ special Python comments following an example's source code:
.. productionlist:: doctest .. productionlist:: doctest
directive: "#" "doctest:" `directive_options` directive: "#" "doctest:" `directive_options`
directive_options: `directive_option` ("," `directive_option`)\* directive_options: `directive_option` ("," `directive_option`)*
directive_option: `on_or_off` `directive_option_name` directive_option: `on_or_off` `directive_option_name`
on_or_off: "+" \| "-" on_or_off: "+" | "-"
directive_option_name: "DONT_ACCEPT_BLANKLINE" \| "NORMALIZE_WHITESPACE" \| ... directive_option_name: "DONT_ACCEPT_BLANKLINE" | "NORMALIZE_WHITESPACE" | ...
Whitespace is not allowed between the ``+`` or ``-`` and the directive option Whitespace is not allowed between the ``+`` or ``-`` and the directive option
name. The directive option name can be any of the option flag names explained name. The directive option name can be any of the option flag names explained