feat: handle case where file may not have trailing newline and parsing depends on it

plugins/common/functions

@@ -402,6 +402,11 @@ copy_from_image() {
     # workaround for CHECKS file when owner is root. seems to only happen when running inside docker
     cat "$TMP_FILE_COMMAND_OUTPUT" | dos2unix -l >"$DST_FILE"
 
+    # add trailing newline for certain places where file parsing depends on it
+    if [[ "$(tail -c1 "$DST_FILE")" != "" ]]; then
+      echo "" >>"$DST_FILE"
+    fi
+
     "$DOCKER_BIN" rm -f "$CID" &>/dev/null
   else
     return 1