Documentation typo

[GWW]

I was attempting to install Symphony from the github repository using the command in the readme:

devtools::install_github("immunogenomics/symphony")

I get the following error:

> devtools::install_github("immunogenomics/symphony")
Error in get(genname, envir = envir) : object 'testthat_print' not found
Error: Failed to install 'unknown package' from GitHub:
  HTTP error 404.
  No commit found for the ref master

  Did you spell the repo owner (`immunogenomics`) and repo name (`symphony`) correctly?
  - If spelling is correct, check that you have the required permissions to access the repo.

The command below does work:

devtools::install_github("immunogenomics/symphony", ref='main')

[joycekang]

Hi, thanks - the issue here is that Github recently changed from "master" to "main" terminology - this is why we added the following line to the README: "You may need to install the latest version of devtools (because of the recent GitHub change from “master” to “main” terminology, which can cause install_github to fail)."