spAddins - RStudio Add-ins to Format R Markdown files (RETIRED PACKAGE)

The development of `spAddins` ended in 2018 as the package retired in favor of packages `addins.rmd` and `addins.rs`. ... RStudio Add-ins to Format Text and Insert Operators ... A set of RStudio addins that are designed to be used in combination with user-defined RStudio keyboard shortcuts. These addins either: 1) insert text at a cursor position (e.g. insert operators %>%, <<-, %$%, etc.), 2) replace symbols in selected pieces of text (e.g., convert backslashes to forward slashes which results in stings like "c:\data\" converted into "c:/data/") or 3) enclose text with special symbols (e.g., converts "bold" into "**bold**") which is convenient for editing R Markdown files.