Non-UTF byte in CCLE drugInfo

[ChristopherEeles]

There is a non-UTF byte in drugInfo(CCLE)[4, 2]. That is the 'Compound..brand.name.' column, I think it is probably a TM symbol. But it breaks a bunch of stuff, such as reading in the table as a .csv in Python. Also some R show methods.

We should have a general mechanism to ensure that only valid UTF-8 strings are stored in a PSet. There is a utility for this already in base called iconv.

We could do something like:

DF$column <- iconv(DF$column, to='UTF-8', sub='')

[ChristopherEeles]

Here is a data.frame wide solution:

DF <- S4Vectors::endoapply(DF, FUN=iconv, to='UTF-8', sub='')