Can't easily rename docvars

[kbenoit]

The indexing is clearly off:

library("quanteda", warn.conflicts = FALSE)
## Package version: 1.4.0
## Parallel computing: 2 of 12 threads used.
## See https://quanteda.io for tutorials and examples.

corp <- corpus(c("A b c d.", "A a b. B c."),
  docvars = data.frame(testdv = 10:11)
)
summary(corp)
## Corpus consisting of 2 documents:
## 
##   Text Types Tokens Sentences testdv
##  text1     5      5         1     10
##  text2     6      7         2     11
## 
## Source: /private/var/folders/1v/ps2x_tvd0yg0lypdlshg_vwc0000gp/T/RtmpwTZK9J/reprexae23aa52f45/* on x86_64 by kbenoit
## Created: Tue Feb 12 12:19:06 2019
## Notes:

names(docvars(corp))[1] <- "renameddv"
docvars(corp)
##       testdv renameddv
## text1     10        10
## text2     11        11
summary(corp)
## Corpus consisting of 2 documents:
## 
##   Text Types Tokens Sentences testdv renameddv
##  text1     5      5         1     10        10
##  text2     6      7         2     11        11
## 
## Source: /private/var/folders/1v/ps2x_tvd0yg0lypdlshg_vwc0000gp/T/RtmpwTZK9J/reprexae23aa52f45/* on x86_64 by kbenoit
## Created: Tue Feb 12 12:19:06 2019
## Notes:

[kbenoit]

I experimented with this for a bit and it's a deep problem, due to the deep and mysterious nature of names<-. I am not sure there is actually a way for us to do this on the data.frame itself without also reassigning it to the corpus.