Repos ambiguous in lockfile when name includes a comma

[jmcphers]

Repro

Set the following repos option:

options(repos = c(
  `CRAN` = "https://cran.rstudio.com/",
  `Oregon State University` = "https://ftp.osuosl.org/pub/cran/",
  `University of California, Berkeley` = "https://cran.cnr.berkeley.edu/"
))

Then, take a snapshot and look at the lockfile.

Observe

The repos in the lockfile are ambiguous, because they are separated with commas.

Repos: CRAN=https://cran.rstudio.com/, Oregon State
    University=https://ftp.osuosl.org/pub/cran/, University of
    California, Berkeley=https://cran.cnr.berkeley.edu/

In other words, this parses to:

CRAN=https://cran.rstudio.com/
Oregon State University=https://ftp.osuosl.org/pub/cran/
University of California
Berkeley=https://cran.cnr.berkeley.edu/

Details

Appears to be happening here:

packrat/R/lockfile.R

Lines 35 to 40 in d95fa76

	# Construct Repos as a key-value pair to write into the lock file
	repos <- activeRepos(dirname(file))
	# Windows automatically transforms \n to \r\n on write through write.dcf
	separator <- ",\n"
	reposString <- paste(names(repos), unname(repos), sep = "=", collapse = separator)

We probably need to escape commas or choose a different delimiter.