get the quote characters right in the readme

README.md

@@ -705,11 +705,11 @@ filters on the key values is performed.
 - `CLI::EscapedString`: 🚧 can be used to process an escaped string. The
   processing is equivalent to that used for TOML config files, see
   [TOML strings](https://toml.io/en/v1.0.0#string). With 2 notable exceptions.
-  '\`' can also be used as a literal string notation, and it also allows binary
+  \` can also be used as a literal string notation, and it also allows binary
   string notation see
   [binary strings](https://cliutils.github.io/CLI11/book/chapters/config.html).
-  The escaped string processing will remove outer quotes if present, '"' will
-  indicate a string with potential escape sequences, `'` and '\`' will indicate
+  The escaped string processing will remove outer quotes if present, `"` will
+  indicate a string with potential escape sequences, `'` and \` will indicate
   a literal string and the quotes removed but no escape sequences will be
   processed. This is the same escape processing as used in config files.