doc: fix code example and formatting in crypto.md

PR-URL: #21500
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: Victor Belozyorov

doc/api/crypto.md

@@ -2067,10 +2067,10 @@ const a = new Uint32Array(10);
 console.log(crypto.randomFillSync(a).toString('hex'));
 
 const b = new Float64Array(10);
-console.log(crypto.randomFillSync(a).toString('hex'));
+console.log(crypto.randomFillSync(b).toString('hex'));
 
 const c = new DataView(new ArrayBuffer(10));
-console.log(crypto.randomFillSync(a).toString('hex'));
+console.log(crypto.randomFillSync(c).toString('hex'));
 ```
 
 ### crypto.randomFill(buffer[, offset][, size], callback)
@@ -2152,11 +2152,11 @@ added: v10.5.0
 - `keylen` {number}
 - `options` {Object}
   - `N` {number} CPU/memory cost parameter. Must be a power of two greater
-                 than one. **Default:** `16384`.
+    than one. **Default:** `16384`.
   - `r` {number} Block size parameter. **Default:** `8`.
   - `p` {number} Parallelization parameter. **Default:** `1`.
   - `maxmem` {number} Memory upper bound. It is an error when (approximately)
-                      `128*N*r > maxmem` **Default:** `32 * 1024 * 1024`.
+    `128 * N * r > maxmem`. **Default:** `32 * 1024 * 1024`.
 - `callback` {Function}
   - `err` {Error}
   - `derivedKey` {Buffer}
@@ -2198,11 +2198,11 @@ added: v10.5.0
 - `keylen` {number}
 - `options` {Object}
   - `N` {number} CPU/memory cost parameter. Must be a power of two greater
-                 than one. **Default:** `16384`.
+    than one. **Default:** `16384`.
   - `r` {number} Block size parameter. **Default:** `8`.
   - `p` {number} Parallelization parameter. **Default:** `1`.
   - `maxmem` {number} Memory upper bound. It is an error when (approximately)
-                      `128*N*r > maxmem` **Default:** `32 * 1024 * 1024`.
+    `128 * N * r > maxmem`. **Default:** `32 * 1024 * 1024`.
 - Returns: {Buffer}
 
 Provides a synchronous [scrypt][] implementation. Scrypt is a password-based