pkstrings: prefer String::from in example

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

pkstrings/examples/strings.rs

@@ -41,7 +41,7 @@ fn read_data(data: Vec<u8>) {
     for (offset, ord) in data.iter().enumerate() {
         // Read current chr
         if let Ok(pkstr) = PKString::try_from(*ord) {
-            buffer.push(pkstr.into_string());
+            buffer.push(String::from(pkstr));
         } else {
             if buffer.len() >= 4 {
                 print_buffer(offset, &buffer);