Move comment explaining to_pk_ctx to more sensible place

Since max_satisfaction_weight no longer takes it

Author: LLFourn

examples/sign_multisig.rs

@@ -83,16 +83,16 @@ fn main() {
     let my_descriptor =
         BitcoinDescriptor::from_str(&descriptor_str[..]).expect("parse descriptor string");
 
-    // Sometimes it is necessary to have additional information to get the bitcoin::PublicKey
-    // from the MiniscriptKey which can supplied by `to_pk_ctx` parameter. For example,
-    // when calculating the script pubkey of a descriptor with xpubs, the secp context and
-    // child information maybe required.
-
     // Check weight for witness satisfaction cost ahead of time.
     // 4(scriptSig length of 0) + 1(witness stack size) + 106(serialized witnessScript)
     // + 73*2(signature length + signatures + sighash bytes) + 1(dummy byte) = 258
     assert_eq!(my_descriptor.max_satisfaction_weight().unwrap(), 258);
 
+    // Sometimes it is necessary to have additional information to get the bitcoin::PublicKey
+    // from the MiniscriptKey which can supplied by `to_pk_ctx` parameter. For example,
+    // when calculating the script pubkey of a descriptor with xpubs, the secp context and
+    // child information maybe required.
+
     // Observe the script properties, just for fun
     assert_eq!(
         format!("{:x}", my_descriptor.script_pubkey(NullCtx)),