Column headers not aligned correctly in RStudio

[wch]

Example:

library(tibble)
data_frame(abcdefg = 1:4, hijklmnop = 5:8, qrstuv = 5:8)

When I copy and paste the text here, it looks OK, but it doesn't look correct in RStudio (tested on 1.1.408 and 1.2.226, Mac). Here's a screenshot:

The alignment looks OK when I run R in a terminal.

sessioninfo::session_info()
# ─ Session info ────────────────────────────────────────────────────────────────────────────────────────────
#  setting  value                       
#  version  R version 3.4.3 (2017-11-30)
#  os       macOS High Sierra 10.13.1   
#  system   x86_64, darwin15.6.0        
#  ui       RStudio                     
#  language (EN)                        
#  collate  en_US.UTF-8                 
#  tz       America/Chicago             
#  date     2018-01-04                  
# 
# ─ Packages ────────────────────────────────────────────────────────────────────────────────────────────────
#  package     * version    date       source                           
#  assertthat    0.2.0      2017-04-11 CRAN (R 3.4.0)                   
#  cli           1.0.0      2017-11-05 CRAN (R 3.4.2)                   
#  clisymbols    1.2.0      2017-05-21 CRAN (R 3.4.0)                   
#  crayon        1.3.4      2017-09-16 CRAN (R 3.4.1)                   
#  pillar        1.0.1      2017-11-27 CRAN (R 3.4.3)                   
#  rlang         0.1.6      2017-12-21 CRAN (R 3.4.3)                   
#  rstudioapi    0.7        2017-09-07 CRAN (R 3.4.1)                   
#  sessioninfo   1.0.0      2017-06-21 CRAN (R 3.4.1)                   
#  tibble      * 1.4.1.9000 2018-01-04 Github (tidyverse/tibble@f965ac0)
#  utf8          1.1.3      2018-01-03 CRAN (R 3.4.3)                   
#  withr         2.1.1      2017-12-19 CRAN (R 3.4.3)                   
#  yaml          2.1.16     2017-12-12 CRAN (R 3.4.3)                   
   

[iacobus42]

It seems like the width of the bolded characters is not the same as the width of the non-bolded characters. That appears to be what is causing the lack of alignment in the RStudio console but not when you copy and paste the text. The alignment in the console does not account for the fact that the font isn't truly fixed width after the bold style is applied.

[wch]

Wow, I think you're right - I hadn't considered that the bold text might be wider.

It looks like it might be the same issue as this:
rstudio/rstudio#1721

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