fix printf to work in mksh

cross-shell-tests

@@ -2,7 +2,7 @@
 # Run urchin in a bunch of different shells,
 # including a shell that isn't quite POSIX-compatible (zsh)
 
-for shell in dash bash ksh zsh; do
+for shell in dash bash mksh ksh zsh; do
   if which $shell > /dev/null 2> /dev/null; then
     echo
     echo Running urchin tests in $shell

urchin

@@ -16,7 +16,9 @@ fullpath() {
 
 indent() {
   level="$1"
-  printf "%$((2 * ${level}))s"
+  if test "$level" -gt 0; then
+    printf "%$((2 * ${level}))s"
+  fi
 }
 
 recurse() {