typo corrected and warning removed as it will not push to gh-pages

vignettes/gd_functions.Rmd

@@ -273,7 +273,7 @@ print(paste0("The poverty severity is ", round(SPG*100,2), "%"))
 ```
 
 Using `pipster`, we simply do:
-```{r severity}
+```{r severity-pipster}
 severity <- pipgd_pov_severity(welfare = pip_gd$L, 
                           weight = pip_gd$P,
                           mean = mu,

vignettes/md_functions.Rmd

@@ -83,7 +83,7 @@ print(paste0("The poverty headcount index is ", round(FGT0*100,2), "%"))
 ```
 In `pipster`, we can simply use the `pipmd_pov_headcount()` function:
 
-```{r headcount-pipster warning = FALSE}
+```{r headcount-pipster}
 pip_FGT0 <- pipmd_pov_headcount(welfare = pip_md$welfare,
                                 weight = pip_md$weight,
                                 povline = z)