Fix a typo (travis-ci#2096)

Author: davidkretch

user/languages/r.md

@@ -349,7 +349,7 @@ Remotes: user/repo
 {: data-file=".travis.yml"}
 
 Remember that `Remotes:` specifies the *source* of a development package, so the package still needs to be listed in `Imports:`, `Suggests:` `Depends:` or `LinkingTo:`.
-In the rare case where *repo* and *package* name differ, `Remotes:` expects the *reposistory* name and `Imports:` expects the *package* name (as per the `DESCRIPTION` of that imported package).
+In the rare case where *repo* and *package* name differ, `Remotes:` expects the *repository* name and `Imports:` expects the *package* name (as per the `DESCRIPTION` of that imported package).
 
 
 ### Remote package in a subdirectory