r - RMarkdown: preserve source code formatting in code cell -

my rmarkdown source looks (screenshot rstudio):

(notice empty lines)

when press ctrl+shift+k got view expected (with empty lines). however, if run chunk (evaluate) , compile (ctrl+shift+k), get:

(no empty lines)

is there way how preserve empty lines in source code? (i checked knitr options: strip.white=false, tidy=true, tidy.opts=list(blank=true) no joy.)

i'm using rstudio 1.0.153

other info:

sessioninfo() r version 3.4.1 (2017-06-30) platform: x86_64-pc-linux-gnu (64-bit) running under: debian gnu/linux 9 (stretch)  matrix products: default blas: /usr/lib/openblas-base/libblas.so.3 lapack: /usr/lib/libopenblasp-r0.2.19.so  locale:  [1] lc_ctype=en_us.utf-8       lc_numeric=c                [3] lc_time=en_us.utf-8        lc_collate=en_us.utf-8      [5] lc_monetary=en_us.utf-8    lc_messages=en_us.utf-8     [7] lc_paper=en_us.utf-8       lc_name=c                   [9] lc_address=c               lc_telephone=c             [11] lc_measurement=en_us.utf-8 lc_identification=c         attached base packages: [1] stats     graphics  grdevices utils     datasets  methods   base       other attached packages: [1] rvest_0.3.2     xml2_1.1.1      dplyr_0.7.1     purrr_0.2.2.2   [5] readr_1.1.1     tidyr_0.6.3     tibble_1.3.3    ggplot2_2.2.1   [9] tidyverse_1.1.1  loaded via namespace (and not attached):  [1] pbdzmq_0.2-6     reshape2_1.4.2   haven_1.1.0      lattice_0.20-35   [5] colorspace_1.3-2 htmltools_0.3.6  yaml_2.1.14      base64enc_0.1-3   [9] xml_3.98-1.9     rlang_0.1.1      foreign_0.8-69   glue_1.1.1       [13] selectr_0.3-1    readxl_1.0.0     modelr_0.1.0     semver_0.2.0     [17] bindrcpp_0.2     bindr_0.1        plyr_1.8.4       stringr_1.2.0    [21] cellranger_1.1.0 munsell_0.4.3    binman_0.1.0     gtable_0.2.0     [25] catools_1.17.1   psych_1.7.5      evaluate_0.10.1  knitr_1.16       [29] forcats_0.2.0    wdman_0.2.2      curl_2.7         parallel_3.4.1   [33] broom_0.4.2      rcpp_0.12.11     openssl_0.9.6    backports_1.1.0  [37] scales_0.4.1     formatr_1.5      rselenium_1.7.1  jsonlite_1.5     [41] mnormt_1.5-5     hms_0.3          digest_0.6.12    stringi_1.1.5    [45] grid_3.4.1       rprojroot_1.2    tools_3.4.1      bitops_1.0-6     [49] magrittr_1.5     lazyeval_0.2.0   pkgconfig_2.0.1  lubridate_1.6.0  [53] httr_1.2.1       assertthat_0.2.0 rmarkdown_1.6    r6_2.2.2         [57] nlme_3.1-131     compiler_3.4.1  

as far can see, can't html notebook. if don't need special notebook features, can ask html_document instead of html_notebook , formatting preserved. if need notebook features, need make feature request on rmarkdown development page https://github.com/rstudio/rmarkdown add this.