Update string concatenation example.

[jrmykolyn]

Problem Statement The 'breakdown' which accompanies the string concatenation example uses a combination of variables which have been defined, variables which have not been defined, and strings. This may lead to confusion when explaining or reading over the material.

Solution Update the snippet to:

• only use variables which have been defined;
• reveal the value contained within each variable.

[svinkle]

This can be thought of as pseudo code to help explain the line of code directly above.

"See this line of code?"

var greetingFull = greeting + " " + greetingTime + "!";

"This is what is happening here…"

"variable 'greetingFull' is being assigned the 'greeting' variable which equates to the string 'Good', plus a space for readability, then the 'greetingTime' variable which equates to 'morning', then we end with an exclamation mark."

This change is not required; closing.

[jrmykolyn]

@svinkle Thanks for reviewing. 👍