chore: some small clean-ups

docs/scripts/check-cookbook-examples.js

@@ -16,7 +16,6 @@ import { spawnSync } from 'node:child_process';
 import { tmpdir } from 'node:os';
 import {
   mkdtempSync,
-  mkdtemp,
   readFileSync,
   readdirSync,
   statSync,

docs/src/content/docs/book/message-mode.mdx

@@ -35,7 +35,7 @@ Alternatively, if you want to send the whole contract balance and destroy it imm
 Here's how the latter example would look in code:
 
 ```tact
-let to: Address = ...;
+let to: Address = address("...");
 let value: Int = ton("1");
 send(SendParameters{
     to: to,

docs/src/content/docs/book/send.mdx

@@ -46,7 +46,7 @@ send(SendParameters{
 Another example sends a message to the specified [`Address{:tact}`][p] with a `value` of $1$ TON and the `body` of a comment with a [`String{:tact}`][p] `"Hello, World!"{:tact}`:
 
 ```tact
-let recipient: Address = ...;
+let recipient: Address = address("...");
 let value: Int = ton("1");
 send(SendParameters{
     // bounce is set to true by default
@@ -64,7 +64,7 @@ The [optional flag](/book/message-mode#optional-flags) `SendIgnoreErrors{:tact}`
 To send a binary typed message you can use the following code:
 
 ```tact
-let recipient: Address = ...;
+let recipient: Address = address("...");
 let value: Int = ton("1");
 send(SendParameters{
     // bounce is set to true by default

docs/src/content/docs/ref/core-math.mdx

@@ -243,9 +243,9 @@ Returns `true{:tact}` if the signature is valid, `false{:tact}` otherwise.
 Usage example:
 
 ```tact
-let data: Slice = ...;
-let signature: Slice = ...;
-let publicKey: Int = ...;
+let data: Slice = some_data;
+let signature: Slice = some_signature;
+let publicKey: Int = 42;
 
 let check: Bool = checkSignature(data, signature, publicKey);
 ```