Dear R Core devs,
I wonder if it makes sense to make function file.rename return invisible? This
is not a big issue, but when running in RMarkdown or knitr, this function will
print results. I have to manually call invisible to hide the output from
showing in the final document:
```r
invisible(file.rename(...))
```
Otherwise knitr will print:
```
file.rename(...)
#> TRUE
```
If this function is designed for debug/interactive use, and the return is
designed to be visible so users don't have to manually print, would it be
possible to add an option to suppress the printing?
Best,
- D
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