UnicodeEncodeError: 'latin-1' codec can't encode character '\u21a6' i

While debugging using `pudb` I got this error in between:

```
byte_count = len(line[i:i+column_count].encode(_target_encoding))
UnicodeEncodeError: 'latin-1' codec can't encode character '\u21a6' in position 3: ordinal not in range(256)

```

Anybody already know these error, then please let me know how to takle it.

Thanks!

Reproduce the failure while debugging with pudb, starting from the reported `line[i:i+column_count].encode(_target_encoding)` expression. Trace which target encoding is selected and how the `↦` character reaches it; done means the reported UnicodeEncodeError no longer occurs for this case, with a regression test if the project’s test location can be identified.

Written by the indexing model from the issue text.