chrisjbillington 13c273f10c Resolve unicode escape sequences not being processed correctly ...

In `process_unicode_escape_sequences()`, any backslash escape sequences
in the original string are escaped upon the first
`.encode('unicode-escape')` and therefore round-trip the sequence of
`.encode('unicode-escape').decode('unicode-escape')`.

That is not what we want - we want these sequences to be passed-through
the `.encode` unchanged, so that they will be converted to the
character they represent upon `.decode()`.

This patch changes the `.encode()` step to pass through any ascii
characters unchanged, only escaping non-ascii characters. This ensures
any existing backslash escape sequences will be interpreted as the
character they represent upon `.decode()`.

2022-10-23 11:51:33 +11:00

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