Typos on if (Serial) reference page

[per1234]

https://www.arduino.cc/en/Serial/IfSerial
Change:

On 32u4 based boards (Leonardo, Yùn, ecc) , if (Serial) indicates wether or not the USB CDC serial connection is open.

to:

On 32u4 based boards (Leonardo, Yùn, ecc) , if (Serial) indicates whether or not the USB CDC serial connection is open.

---

Change:

For all other instances, including if (Serial1) on the Leonardo, this will always returns true.

to:

For all other instances, including if (Serial1) on the Leonardo, this will always return true.

---

Change:

boolean : returns true if the specified serial port is available.

to:

boolean: Returns true if the specified serial port is available.

[akash73]

fixed thanks!