Update instructions for GitHub repository naming.

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: RPiR
 Type: Package
 Title: Reproducible Programming in R
-Version: 0.76.12
+Version: 0.76.13
 Authors@R: c(person("Sonia", "Mitchell", email = "[email protected]",
                     role = c("aut"), 
                     comment = c(ORCID = "0000-0003-1536-2066")),

inst/tutorials/practical2-1/practical2-1.Rmd

@@ -68,6 +68,8 @@ documentation pages](https://sbohvm.github.io/RPiR/articles/pages/github.html)
 that you used for the last practical, putting the repository in
 the [SBOHVM](https://github.com/SBOHVM) organisation again, as before. Call this
 project `githubusernameSeries02` (obviously use your real GitHub username!).
+Remember that if your GitHub username has dashes or underscores, don't include
+them in the repository name however, as they are illegal in R package names.
 You'll use this single project for all of the exercises in this practical
 series. If you are already in a coding group, then add the specific people that
 need to be added to your repository on GitHub in **Settings** ->

vignettes/pages/github.Rmd

@@ -38,7 +38,9 @@ knitr::include_graphics('images/use-github-01.png')
 You should always choose a short, descriptive name for your repository. But in
 this case, to make it easier for us to identify you, please include your name 
 as well as an identifier associated with the practical you're working on, e.g.
-`githubusernameSeries01`. Make sure you're creating
+`githubusernameSeries01`. If your GitHub username has dashes or underscores,
+don't include them in the repository name however, as they are illegal in R
+package names. Make sure you're creating
 a <span style="color: #de77ae;">Private</span> repository, check the box to
 <span style="color: #de77ae;">Initialize this repository with a README</span>,
 then select <span style="color: #de77ae;">Create repository</span>.