Fix 2005/persano make clobber, .gitignore, try.sh

The make clobber fix is important for updating the manifest. The
.gitignore left a .gif file out but now it just ignores '*.gif'. The
script was updated with some newlines to separate commands.

2005/persano/try.sh

@@ -24,6 +24,7 @@ if [[ -f knot3-16.gif ]]; then
     echo "Now open the file knot3-16.gif in a GIF viewer capable of viewing animated" 1>&2
     echo "GIFs. See the README.md for details on a tool to manipulate it, if you wish." 1>&2
 fi
+echo 1>&2
 
 read -r -n 1 -p "Press any key to run: ./persano 3 2 1 > foo.gif: "
 echo 1>&2
@@ -33,6 +34,7 @@ if [[ -f foo.gif ]]; then
     echo "Now open the file foo.gif in a GIF viewer capable of viewing animated" 1>&2
     echo "GIFs. See the README.md for details on a tool to manipulate it, if you wish." 1>&2
 fi
+echo 1>&2
 
 read -r -n 1 -p "Press any key to run: ./persano 5 2 > seal.gif: "
 echo 1>&2
@@ -43,3 +45,4 @@ if [[ -f seal.gif ]]; then
     echo "Now open seal.gif (Solomon's Seal knot) in a GIF viewer capable of viewing" 1>&2
     echo "animated GIFs. See the README.md for details on a tool to manipulate it, if you wish." 1>&2
 fi
+echo 1>&2