cli_run: support examples with more than one path argument

crates/cli_utils/src/helpers.rs

@@ -164,7 +164,7 @@ where
 pub fn run_cmd<'a, I: IntoIterator<Item = &'a str>>(
     cmd_name: &str,
     stdin_vals: I,
-    args: &[&str],
+    args: &[String],
 ) -> Out {
     let mut cmd = Command::new(cmd_name);
 
@@ -202,7 +202,7 @@ pub fn run_cmd<'a, I: IntoIterator<Item = &'a str>>(
 
 pub fn run_with_valgrind<'a, I: IntoIterator<Item = &'a str>>(
     stdin_vals: I,
-    args: &[&str],
+    args: &[String],
 ) -> (Out, String) {
     //TODO: figure out if there is a better way to get the valgrind executable.
     let mut cmd = Command::new("valgrind");