diff --git a/lectures/lecture_trees_joining.md b/lectures/lecture_trees_joining.md
index 71e0b74..4e1370d 100644
--- a/lectures/lecture_trees_joining.md
+++ b/lectures/lecture_trees_joining.md
@@ -190,27 +190,26 @@ use_readme_md(open = FALSE)
 - The second line is a longer description:
 
 `````
-    #' Portal Data Set and Analysis
-    #'
-    #' This package contains data sets from the Portal Project
-    #' for easy reuse and reanalysis.
-    #'
-    #' @docType package
-    #' @name portaldata
-    #' @aliases portaldata portaldata-package
-    NULL
-
-    #' Taxonomy of species sampled
-    #'
-    #' A data set containing the taxonomy of species sampled for the Portal Project Data.
-    #' We followed the taxonomy from the Open Tree of Life .
-    #'
-    #' @source \url{https://lunasare.github.io/spring2023-data-science/data/portal-species-taxonomy.csv}
-    #' @format A data frame with X number of columns and Y number of rows
-    "taxonomy"
+#' Portal Data Set and Analysis
+#'
+#' This package contains data sets from the Portal Project
+#' for easy reuse and reanalysis.
+#'
+#' @docType package
+#' @name portaldata
+#' @aliases portaldata portaldata-package
+NULL
+#' Taxonomy of species sampled
+#'
+#' A data set containing the taxonomy of species sampled for the Portal Project Data.
+#' We followed the taxonomy from the Open Tree of Life .
+#'
+#' @source \url{https://lunasare.github.io/spring2023-data-science/data/portal-species-taxonomy.csv}
+#' @format A data frame with X number of columns and Y number of rows
+"taxonomy"
 `````
 
-- To interpret the documentation file we will use a function from the package `roxygen2` (or `devtools`)
+- To interpret the documentation file, we will use a function from the package `roxygen2` (or `devtools`)
 ```
 install.packages("roxygen2")
 library(roxygen2)