Clarify comment on CHECK_CLTV_EXPIRE_SANITY_2 somewhat

Author: TheBlueMatt

lightning/src/ln/channelmanager.rs

@@ -593,7 +593,7 @@ pub const MIN_FINAL_CLTV_EXPIRY: u32 = HTLC_FAIL_BACK_BUFFER + 3;
 #[allow(dead_code)]
 const CHECK_CLTV_EXPIRY_SANITY: u32 = MIN_CLTV_EXPIRY_DELTA as u32 - LATENCY_GRACE_PERIOD_BLOCKS - CLTV_CLAIM_BUFFER - ANTI_REORG_DELAY - LATENCY_GRACE_PERIOD_BLOCKS;
 
-// Check for ability of an attacker to make us fail on-chain by delaying inbound claim. See
+// Check for ability of an attacker to make us fail on-chain by delaying an HTLC claim. See
 // ChannelMontior::would_broadcast_at_height for a description of why this is needed.
 #[deny(const_err)]
 #[allow(dead_code)]