airGR citations are updated

inst/CITATION

@@ -7,7 +7,7 @@ citEntry(entry="Article",
   	year = "in prep.",       
         textVersion = 
         paste("Coron, L., Thirel, G., Delaigue, O., Perrin, C. and Andréassian, V. ",
-	       "(in prep.): ", 
+	       "(in prep.). ", 
                "airGR: A suite of lumped hydrological models in an R-package. ",
                "Environmental Modelling and software. ",
                sep="")
@@ -22,7 +22,7 @@ citEntry(entry="Manual",
     url = "https://webgr.irstea.fr/airGR/?lang=en",
         textVersion = 
         paste("Coron, L., Perrin, C. and Michel, C. ",
-	       "(2016): ", 
+	       "(2016). ", 
                "airGR: Suite of GR hydrological models for precipitation-runoff modelling. ",
                "R package version 1.0.2 ",
                "https://webgr.irstea.fr/airGR/?lang=en",