Slight improvements in 1990/jaw/try.sh

chmod +x the scripts so that one needn't use 'sh' (this also helps with
shell completion for those who use it).

1990/jaw/try.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 echo "Running shark.sh:"
-sh shark.sh shark.sh README.md jaw.c try.sh > receive || exit 1
+./shark.sh shark.sh README.md jaw.c try.sh > receive || exit 1
 echo "Done."
 
 
@@ -13,9 +13,10 @@ mkdir -p test || exit 0
 
 # make sure we can cd to the new directory
 cd test || exit
+chmod +x ../receive
 # run the script
 echo "Attempting to extract files:"
-sh ../receive
+../receive
 
 echo 1>&2
 echo "$ ls -al" 1>&2