Unicode character expressions such as _x000D_ not handled

[hempalex]

If cell contains html code then line endings are encoded like _x000D_ and not handled correctly by converter. Example file: hex.xlsx

Same problem I've found here https://github.com/tidyverse/readxl/issues/51

[hempalex]

It seems it's in specification https://docs.microsoft.com/en-us/openspecs/office_standards/ms-oi29500/d34ae755-c53f-4a44-a363-c6dd3ee018a4