Description: Fix test suite issue to work with upgraded stringr
Origin: https://code.bioconductor.org/browse/MutationalPatterns/raw/RELEASE_3_16/R/lengthen_mut_matrix.R
Author: "Roosmalen-3, M.J. van (Mark)" <M.J.vanRoosmalen-3@prinsesmaximacentrum.nl>
        (applied by Andreas Tille <tille@debian.org>)
Last-Update: Thu, 26 Jan 2023 11:25:12 +0100

--- a/R/lengthen_mut_matrix.R
+++ b/R/lengthen_mut_matrix.R
@@ -79,7 +79,7 @@ lengthen_mut_matrix <- function(mut_matr
   # Determine the new rownames of the mut_mat
   types <- stringr::str_remove(col_names, ".*\\.")
   types_rownames <- rep(types, each = nrow(mut_matrix))
-  new_rownames <- stringr::str_c(rownames(mut_matrix), "_", types_rownames)
+  new_rownames <- paste(rownames(mut_matrix),"_",types_rownames,sep="")
 
   # Change shape of mutation matrix to a single column
   dim(mut_matrix) <- c(length(new_rownames), 1)
