Minor fix/enhance of a few comments

Signed-off-by: Keith Koskie <[email protected]>

cryptoki/src/slot/slot_info.rs

@@ -47,7 +47,7 @@ impl SlotInfo {
     ///
     /// **[Conformance](crate#conformance-notes):**
     /// If this slot does not represent a removable device, a token is *always*
-    /// considered to be present. That is, `slot.removable device() == false`
+    /// considered to be present. That is, `slot.removable_device() == false`
     /// implies `slot.token_present() == true`.
     pub fn token_present(&self) -> bool {
         self.flags.contains(SlotInfoFlags::TOKEN_PRESENT)

cryptoki/src/slot/token_info.rs

@@ -50,10 +50,14 @@ pub enum Limit {
 /// Information about a token
 #[derive(Debug, Clone)]
 pub struct TokenInfo {
-    label: String,           // 32
-    manufacturer_id: String, // 32
-    model: String,           // 16
-    serial_number: String,   // 16
+    // The following four strings are limited in size based on
+    // the orignating struct definition. Sizes are in *bytes*
+    // but UTF-8 data may represent fewer characters.
+    // Original buffers were space (0x20) padded.
+    label: String,           // len <= 32 bytes
+    manufacturer_id: String, // len <= 32 bytes
+    model: String,           // len <= 16 bytes
+    serial_number: String,   // len <= 16 bytes
     flags: TokenInfoFlags,
     max_session_count: Limit,
     session_count: Option<u64>,