small update to counts

Author: eddelbuettel

README.md

@@ -10,22 +10,22 @@ types are supported (vectors, functions, environment, etc ...)  and each
 type is mapped to a dedicated class. For example, numeric vectors are
 represented as instances of the Rcpp::NumericVector class, environments are
 represented as instances of Rcpp::Environment, functions are represented as
-Rcpp::Function, etc ... 
+Rcpp::Function, etc ...
 The
 [Rcpp-introduction](https://cran.r-project.org/package=Rcpp/vignettes/Rcpp-introduction.pdf)
 vignette (also published as a [JSS paper](http://www.jstatsoft.org/v40/i08/)) provides a good
 entry point to Rcpp as do the [Rcpp website](http://www.rcpp.org), the
-[Rcpp page](http://dirk.eddelbuettel.com/code/rcpp.html) and the 
+[Rcpp page](http://dirk.eddelbuettel.com/code/rcpp.html) and the
 [Rcpp Gallery](http://gallery.rcpp.org). Full documentation
 is provided by the [Rcpp book](http://www.rcpp.org/book/).
 
-Conversion from C++ to R and back is driven by the templates `Rcpp::wrap` 
+Conversion from C++ to R and back is driven by the templates `Rcpp::wrap`
 and `Rcpp::as` which are highly flexible and extensible, as documented
 in the [Rcpp-extending](https://cran.r-project.org/package=Rcpp/vignettes/Rcpp-extending.pdf) vignette.
 
-Rcpp also provides Rcpp modules, a framework that allows exposing 
+Rcpp also provides Rcpp modules, a framework that allows exposing
 C++ functions and classes to the R level. The [Rcpp-modules](https://cran.r-project.org/package=Rcpp/vignettes/Rcpp-modules.pdf) vignette
-details the current set of features of Rcpp-modules. 
+details the current set of features of Rcpp-modules.
 
 Rcpp includes a concept called Rcpp sugar that brings many R functions
 into C++. Sugar takes advantage of lazy evaluation and expression templates
@@ -39,42 +39,42 @@ required to invoke them.  Attributes are intended to facilitate both
 interactive use of C++ within R sessions as well as to support R
 package development. Attributes are built on top of Rcpp modules and
 their implementation is based on previous work in the inline package.
-See the [Rcpp-atttributes](https://cran.r-project.org/package=Rcpp/vignettes/Rcpp-attributes.pdf) vignettes for more details. 
+See the [Rcpp-atttributes](https://cran.r-project.org/package=Rcpp/vignettes/Rcpp-attributes.pdf) vignettes for more details.
 
-### Documentation 
+### Documentation
 
-The package ships with nine pdf vignettes. 
+The package ships with nine pdf vignettes.
 
-Additional documentation is available via the 
+Additional documentation is available via the
 [JSS paper](http://www.jstatsoft.org/v40/i08/) by Eddelbuettel and
-Francois (2011, JSS) paper (corresponding to the 'intro' vignette) 
-and the [book](http://www.rcpp.org/book) by Eddelbuettel (2013, Springer); 
+Francois (2011, JSS) paper (corresponding to the 'intro' vignette)
+and the [book](http://www.rcpp.org/book) by Eddelbuettel (2013, Springer);
 see 'citation("Rcpp")' for details.
 
 ### Examples
 
 The [Rcpp Gallery](http://gallery.rcpp.org) showcases over one hundred fully
 documented and working examples.
 
-A number of examples are included as are 1394 unit tests in 606 unit
+A number of examples are included as are 1429 unit tests in 618 unit
 test functions provide additional usage examples.
 
 An earlier version of Rcpp, containing what we now call the 'classic Rcpp
 API' was written during 2005 and 2006 by Dominick Samperi.  This code has
 been factored out of Rcpp into the package RcppClassic, and it is still
-available for code relying on the older interface. New development should 
+available for code relying on the older interface. New development should
 always use this Rcpp package instead.
 
-Other usage examples are provided by packages using Rcpp. As of March 2018,
-there are 1309 [CRAN](https://cran.r-project.org) packages using Rcpp, a further
+Other usage examples are provided by packages using Rcpp. As of July 2018,
+there are 1402 [CRAN](https://cran.r-project.org) packages using Rcpp, a further
 91 [BioConductor](http://www.bioconductor.org) packages in its current release
 as well as an unknown number of GitHub, Bitbucket, R-Forge, ... repositories
 using Rcpp.  All these packages provide usage examples for Rcpp.
 
 ### Installation
 
 Released and tested versions of Rcpp are available via the
-[CRAN](https://cran.r-project.org) network, and can be installed from within R via 
+[CRAN](https://cran.r-project.org) network, and can be installed from within R via
 
 ```R
 install.packages("Rcpp")
@@ -95,7 +95,7 @@ if your question has been asked before.
 
 Another option is to use
 [StackOverflow and its 'rcpp' tag](http://stackoverflow.com/questions/tagged/rcpp).
-Search functionality (use `rcpp` in squared brackets as in 
+Search functionality (use `rcpp` in squared brackets as in
 [[rcpp] my question terms](https://stackoverflow.com/search?q=[rcpp]%20my%20question%20terms)
 to tag the query) is very valuable as many questions have indeed been asked, and
 answered, before.
@@ -108,7 +108,7 @@ previous issues can be searched as well.
 ### Authors
 
 Dirk Eddelbuettel, Romain Francois, JJ Allaire, Kevin Ushey, Qiang Kou,
-Nathan Russell, Doug Bates, and John Chambers 
+Nathan Russell, Doug Bates, and John Chambers
 
 ### License