fix lint error about backquotes

Author: methane

peps/pep-0822.rst

@@ -20,7 +20,7 @@ This PEP proposes to add a feature that automatically removes indentation from m
 
 Dedented multiline strings use a new prefix "d" (shorthand for "dedent") before the opening quote of a multiline string literal.
 
-Example (spaces are visualized as `_`):
+Example (spaces are visualized as ``_``):
 
 .. code-block:: python
 
@@ -262,7 +262,7 @@ However, d-string is more suitable for multiline string literals because:
 triple-backquote
 -----------------
 
-It is considered that `using triple backquotes ("\`\`\`") <https://discuss.python.org/t/40679>`__
+It is considered that `using triple backquotes <https://discuss.python.org/t/40679>`__
 for dedented multiline strings could be an alternative syntax.
 This notation is familiar to us from Markdown. While there were past concerns about certain keyboard layouts,
 nowadays many people are accustomed to typing this notation.