Error with `document_and_reload()` if the param `file` in `get_golem_config` is a function calling `app_sys()`

[LDSamson]

To Reproduce

1. Open a new Golem project and replace the get_golem_config() file paramer (file = app_sys("golem-config.yml") ) with the following:
   file = Sys.getenv("CONFIG_PATH", app_sys("golem-config.yml")).
2. Run golem::run_dev

The following error will occur in golem version 0.5.0 or 0.5.1, but not in golem version 0.4.1:

Error in guess_where_config(path) : 
  It appears that two golem config files exist:
- the default 'inst/golem-config.yml'
- file read from an app_sys()-call in 'R/app_config.R'
=> Resolve via either of the two options:
1. KEEP USER-FILE: rename/delete default 'inst/golem-config.yml'
2. KEEP DEFAULT: change 'app_sys(...)' to 'app_sys('golem-config.yml')'.

I think it goes wrong in the function guess_lines_to_config_file (called internally by golem::document_and_reload() ). This function expects the file argument only to contain a single call to app_sys() and uses regex to retrieve this call. It does not recognize the use case described above and will return a broken user path similar to this:

C:/app_location/test_golemapp/inst/CONFIG_PATH", app_sys("golem-config.yml

Session Info

version R version 4.4.1 (2024-06-14 ucrt) os Windows 11 x64 (build 22631) system x86_64, mingw32 ui RStudio language en collate German_Germany.utf8 ctype German_Germany.utf8 tz Europe/Berlin date 2024-09-09 rstudio 2024.04.2+764 Chocolate Cosmos (desktop) pandoc NA

─ Packages ! package * version date (UTC) lib source
P attempt 0.3.1 2020-05-03 [?] RSPM
P cachem 1.1.0 2024-05-16 [?] RSPM
P cli 3.6.3 2024-06-21 [?] CRAN (R 4.4.1)
P config 0.3.2 2023-08-30 [?] RSPM
P devtools 2.4.5 2022-10-11 [?] RSPM
P digest 0.6.37 2024-08-19 [?] RSPM
P ellipsis 0.3.2 2021-04-29 [?] RSPM
P fastmap 1.2.0 2024-05-15 [?] RSPM
P fs 1.6.4 2024-04-25 [?] RSPM (R 4.4.0)
P glue 1.7.0 2024-01-09 [?] RSPM (R 4.4.0)
P golem 0.5.1 2024-08-27 [?] RSPM
P htmltools 0.5.8.1 2024-04-04 [?] RSPM (R 4.4.0)
P htmlwidgets 1.6.4 2023-12-06 [?] RSPM
P httpuv 1.6.15 2024-03-26 [?] RSPM (R 4.4.0)
P later 1.3.2 2023-12-06 [?] RSPM (R 4.4.0)
P lifecycle 1.0.4 2023-11-07 [?] RSPM (R 4.4.0)
P magrittr 2.0.3 2022-03-30 [?] RSPM (R 4.4.0)
P memoise 2.0.1 2021-11-26 [?] RSPM (R 4.4.0)
P mime 0.12 2021-09-28 [?] RSPM (R 4.4.0)
P miniUI 0.1.1.1 2018-05-18 [?] RSPM
P pkgbuild 1.4.4 2024-03-17 [?] RSPM
P pkgload 1.4.0 2024-06-28 [?] RSPM
P profvis 0.3.8 2023-05-02 [?] RSPM
P promises 1.3.0 2024-04-05 [?] RSPM (R 4.4.0)
P purrr 1.0.2 2023-08-10 [?] RSPM
P R6 2.5.1 2021-08-19 [?] RSPM (R 4.4.0)
P Rcpp 1.0.13 2024-07-17 [?] RSPM
P remotes 2.5.0 2024-03-17 [?] RSPM
renv 1.0.7 2024-04-11 [1] CRAN (R 4.4.1)
P rlang 1.1.4 2024-06-04 [?] CRAN (R 4.4.1)
P rstudioapi 0.16.0 2024-03-24 [?] RSPM
P sessioninfo 1.2.2 2021-12-06 [?] RSPM
P shiny 1.9.1 2024-08-01 [?] RSPM
P stringi 1.8.4 2024-05-06 [?] RSPM
P stringr 1.5.1 2023-11-14 [?] RSPM
P urlchecker 1.0.1 2021-11-30 [?] RSPM
P usethis 3.0.0 2024-07-29 [?] CRAN (R 4.4.1)
P vctrs 0.6.5 2023-12-01 [?] RSPM (R 4.4.0)
P xtable 1.8-4 2019-04-21 [?] RSPM (R 4.4.0)
P yaml 2.3.10 2024-07-26 [?] CRAN (R 4.4.1)