Practice String Methods

Write a function process_space_csv(csv_line) that takes a CSV string of planet names. The function should:

1. Split the string on commas.
2. Strip surrounding whitespace from each name.
3. Ignore any empty entries.
4. Convert each remaining name to title case (first letter capital, the rest lower).
5. Return the cleaned names joined by a single space.

Examples

• process_space_csv("earth, mars,Venus") returns "Earth Mars Venus".
• process_space_csv("pluto,,Mercury") returns "Pluto Mercury".