modify readme

README.md

@@ -1,9 +1,8 @@
 [![R-CMD-check](https://github.com/BrunoVilela/letsR/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/BrunoVilela/letsR/actions/workflows/R-CMD-check.yaml)
-[![Coverage Status](https://coveralls.io/repos/BrunoVilela/letsR/badge.svg)](https://coveralls.io/github/BrunoVilela/letsR)
 [![CRAN_Status_Badge](https://www.r-pkg.org/badges/version/letsR)](https://CRAN.R-project.org/package=letsR)
 [![rstudio mirror downloads](https://cranlogs.r-pkg.org/badges/letsR)]( https://github.com/r-hub/cranlogs.app)
 [![rstudio mirror downloads](https://cranlogs.r-pkg.org/badges/grand-total/letsR)]( https://github.com/r-hub/cranlogs.app)
-[![Research software impact](https://depsy.org/api/package/cran/letsR/badge.svg)](https://depsy.org/package/r/letsR)
+[![Research software impact](http://depsy.org/api/package/cran/letsR/badge.svg)](https://depsy.org/package/r/letsR)
 
 # letsR <img src="man/figures/letsr.png" align="right" height="200" style="float:right; height:200px;" />
 
@@ -15,7 +14,7 @@ All functions in this package use a prefix and a suffix separated by a dot; the
 For instance, the letsR function used to create presence-absence matrices is called `lets.presab` (but see also `lets.presab.birds` and `lets.presab.points`), whereas the one used to add variables to a presence-absence matrix is called `lets.addvar`.  
 The package's primary functions create and work on a particular S3 object class called `PresenceAbsence`. 
 Such `PresenceAbsence` object class allows storing information beyond presence-absence data (e.g. user-defined grid-cell system) and using the generic `plot`, `summary` and `print` functions of R. 
-Also, some package's functions allow the user to input customary R objects (e.g. `vector`, `matrix`, `data.frame`. 
+Also, some package's functions allow the user to input customary R objects (e.g. `vector`, `matrix`, `data.frame`). 
 
 The letsR package is in continuous development, and suggestions are more than welcome!