Renaming columns inside `relocate()`

[Pozdniakov]

Both functions select() and rename() allows renaming by using assignment inside them. It would be nice to have the same feature in relocate()

#reprex

> library(tidyverse)
> df <- tibble(a = 1, b = 1, c = 1, d = "a", e = "a", f = "a")
> 
> rename(df, ffff = f)

# A tibble: 1 x 6
      a     b     c d     e     ffff 
  <dbl> <dbl> <dbl> <chr> <chr> <chr>
1     1     1     1 a     a     a    

> select(df, ffff = f)

# A tibble: 1 x 1
  ffff 
  <chr>
1 a    

> relocate(df, ffff = f)

# A tibble: 1 x 6
  f         a     b     c d     e    
  <chr> <dbl> <dbl> <dbl> <chr> <chr>
1 a         1     1     1 a     a    

It would be nice to have instead

> relocate(df, ffff = f)

# A tibble: 1 x 6
  ffff      a     b     c d     e    
  <chr> <dbl> <dbl> <dbl> <chr> <chr>
1 a         1     1     1 a     a    

#sessionInfo

sessionInfo()

R version 4.0.2 (2020-06-22)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Catalina 10.15.2

Matrix products: default
BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib

locale:
[1] ru_RU.UTF-8/ru_RU.UTF-8/ru_RU.UTF-8/C/ru_RU.UTF-8/ru_RU.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] forcats_0.5.0   stringr_1.4.0   dplyr_1.0.2     purrr_0.3.4     readr_1.4.0     tidyr_1.1.2    
[7] tibble_3.0.4    ggplot2_3.3.2   tidyverse_1.3.0

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.5       cellranger_1.1.0 pillar_1.4.6     compiler_4.0.2   dbplyr_1.4.4    
 [6] tools_4.0.2      jsonlite_1.7.1   lubridate_1.7.9  lifecycle_0.2.0  gtable_0.3.0    
[11] pkgconfig_2.0.3  rlang_0.4.8      reprex_0.3.0     cli_2.0.2        DBI_1.1.0       
[16] rstudioapi_0.11  yaml_2.2.1       haven_2.3.1      withr_2.3.0      xml2_1.3.2      
[21] httr_1.4.2       fs_1.5.0         generics_0.0.2   vctrs_0.3.4      hms_0.5.3       
[26] grid_4.0.2       tidyselect_1.1.0 glue_1.4.2       R6_2.4.1         fansi_0.4.1     
[31] readxl_1.3.1     modelr_0.1.8     blob_1.2.1       magrittr_1.5     backports_1.1.10
[36] scales_1.1.1     ellipsis_0.3.1   rvest_0.3.6      assertthat_0.2.1 colorspace_1.4-1
[41] stringi_1.5.3    munsell_0.5.0    broom_0.7.2      crayon_1.3.4