diff --git a/R/verbatim_popup.R b/R/verbatim_popup.R
index 2c72979a..f2f4d3ed 100644
--- a/R/verbatim_popup.R
+++ b/R/verbatim_popup.R
@@ -1,11 +1,11 @@
-#' A `shiny` module that pops up verbatim text
+#' A `shiny` module that pops up verbatim text.
 #' @name verbatim_popup
 #' @description `r lifecycle::badge("experimental")`
 #' This module consists of a button that once clicked pops up a
 #' modal window with verbatim-styled text.
 #'
 #' @param id (`character(1)`) the `shiny` id
-#' @param button_label (`charater(1)`) the text printed on the button
+#' @param button_label (`character(1)`) the text printed on the button
 #' @param ... additional arguments to `[shiny::actionButton()]`
 #'
 #' @return the UI function returns a `shiny.tag.list` object
@@ -20,6 +20,7 @@
 #'
 verbatim_popup_ui <- function(id, button_label, ...) {
   checkmate::assert_string(id)
+  checkmate::assert_string(button_label)
   ns <- shiny::NS(id)
   shiny::tagList(
     shiny::tags$head(shiny::singleton(
@@ -64,7 +65,7 @@ verbatim_popup_srv <- function(id, verbatim_content, title, disabled = shiny::re
   })
 }
 
-#' Creates a `shiny` observer handling the disabled flag
+#' Creates a `shiny` observer handling the disabled flag.
 #'
 #' @details
 #' When the flag is `TRUE` the button to open the popup is disabled; it is enabled otherwise.
@@ -87,6 +88,9 @@ disabled_flag_observer <- function(disabled_flag, button_id) {
 
 #' Creates a `shiny` observer handling button clicks.
 #'
+#' @description
+#' When the button is clicked it pop up a modal window with the text.
+#'
 #' @keywords internal
 #' @param click_event `reactive` the click event
 #' @param copy_button_id (`character(1)`) the id of the button to copy the modal content
diff --git a/man/button_click_observer.Rd b/man/button_click_observer.Rd
index 8d998288..0b1a6aeb 100644
--- a/man/button_click_observer.Rd
+++ b/man/button_click_observer.Rd
@@ -24,6 +24,6 @@ button_click_observer(
 \item{modal_content}{(\code{reactive}) the content of the modal window}
 }
 \description{
-Creates a \code{shiny} observer handling button clicks.
+When the button is clicked it pop up a modal window with the text.
 }
 \keyword{internal}
diff --git a/man/disabled_flag_observer.Rd b/man/disabled_flag_observer.Rd
index 94cc17ee..4eab7d7a 100644
--- a/man/disabled_flag_observer.Rd
+++ b/man/disabled_flag_observer.Rd
@@ -2,7 +2,7 @@
 % Please edit documentation in R/verbatim_popup.R
 \name{disabled_flag_observer}
 \alias{disabled_flag_observer}
-\title{Creates a \code{shiny} observer handling the disabled flag}
+\title{Creates a \code{shiny} observer handling the disabled flag.}
 \usage{
 disabled_flag_observer(disabled_flag, button_id)
 }
@@ -12,7 +12,7 @@ disabled_flag_observer(disabled_flag, button_id)
 \item{button_id}{(\code{character(1)}) the id of the controlled button}
 }
 \description{
-Creates a \code{shiny} observer handling the disabled flag
+Creates a \code{shiny} observer handling the disabled flag.
 }
 \details{
 When the flag is \code{TRUE} the button to open the popup is disabled; it is enabled otherwise.
diff --git a/man/verbatim_popup.Rd b/man/verbatim_popup.Rd
index e050dbaa..a89c332f 100644
--- a/man/verbatim_popup.Rd
+++ b/man/verbatim_popup.Rd
@@ -4,7 +4,7 @@
 \alias{verbatim_popup}
 \alias{verbatim_popup_ui}
 \alias{verbatim_popup_srv}
-\title{A \code{shiny} module that pops up verbatim text}
+\title{A \code{shiny} module that pops up verbatim text.}
 \usage{
 verbatim_popup_ui(id, button_label, ...)
 
@@ -18,7 +18,7 @@ verbatim_popup_srv(
 \arguments{
 \item{id}{(\code{character(1)}) the \code{shiny} id}
 
-\item{button_label}{(\code{charater(1)}) the text printed on the button}
+\item{button_label}{(\code{character(1)}) the text printed on the button}
 
 \item{...}{additional arguments to \verb{[shiny::actionButton()]}}