[Rd] R package builder silently continues after unclosed brace

[Abby Spurdle]

Try R check or the source function:

---- (From R check)

> R CMD check testpkg
R CMD check testpkg
* using log directory 'c:/proj/shared/testpkg.Rcheck'
* using R version 3.6.0 (2019-04-26)
* using platform: x86_64-w64-mingw32 (64-bit)
* using session charset: ISO8859-1
* checking for file 'testpkg/DESCRIPTION' ... OK
* this is package 'testpkg' version '0.1.0'
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'testpkg' can be installed ... ERROR
Installation failed.
See 'c:/proj/shared/testpkg.Rcheck/00install.out' for details.
* DONE
Status: 1 ERROR

---- (From 00install.out)

* installing *source* package 'testpkg' ...
** using staged installation
** R
Error in parse(outFile) :
  c:/proj/shared/testpkg/R/b.R:4:0: unexpected end of input
2:   print("unclosed function_b")
3: # no closing }
  ^
ERROR: unable to collate and parse R files for package 'testpkg'
* removing 'c:/proj/shared/testpkg.Rcheck/testpkg'

---- (from the source function)

source ("c:/proj/shared/testpkg/R/b.R", echo=TRUE)
Error in source("c:/proj/shared/testpkg/R/b.R", echo = TRUE) :
  c:/proj/shared/testpkg/R/b.R:4:0: unexpected end of input
2:   print("unclosed function_b")
3: # no closing }