Fixing a few typos around the project.

scriptmodules/archivefuncs.sh

@@ -17,7 +17,7 @@ readonly arch_dir="/tmp/retropie-archive"
 
 ## @fn archiveExtract()
 ## @param src_file Full path to archive file to extract
-## @param disk_exts Space seperated list of supported disk extensions (e.g. ".d64 .t64")
+## @param disk_exts Space separated list of supported disk extensions (e.g. ".d64 .t64")
 ## @brief Extracts an archive to a temporary directory
 ## @details After calling this the variable arch_dir will contain the directory that was used
 ## for extraction. Also the variable arch_files will contain an array of filenames that are

scriptmodules/helpers.sh

@@ -464,7 +464,7 @@ function moveConfigFile() {
 ## @brief Compares two files using diff.
 ## @retval 0 if the files were the same
 ## @retval 1 if they were not
-## @retval >1 an error occured
+## @retval >1 an error occurred
 function diffFiles() {
     diff -q "$1" "$2" >/dev/null
     return $?

scriptmodules/packages.sh

@@ -267,7 +267,7 @@ function rp_callModule() {
                 fi
             done
         else
-            # check for existance and copy any files/directories returned
+            # check for existence and copy any files/directories returned
             if [[ -n "$md_ret_files" ]]; then
                 for file in "${md_ret_files[@]}"; do
                     if [[ ! -e "$md_build/$file" ]]; then