Write a function clean(txt) to split the text string txt into a list of words, and then concatenate all words into a new text string inserting one empty space ' ' between them. At the end, return the result as a new text string. Make sure that the result does not end with a trailing space - you can do that using the method rstrip(). Use the docstring """Removes unwanted spaces and special characters""". Do not change the main program. Expected output: "If debugging is the process of removing software bugs, then programming must be the process of putting them in." (Edsger W. Dijkstra) (Edsger W. Dijkstra (1930 - 2002) of Dutch origin was a famous computer programmer, science essayist, and early pioneer in computer science.)

# Main program (do not change): text = '"If debugging is the process of removing software bugs, then programming must be the process of putting them in." (Edsger W. Dijkstra) ' print(clean(text))

In your function, first insert the docstring. Then split the text string txt into a list of words L. Create a new empty text string result. Use a for loop to go through the list L, and in each cycle update result with the word plus one empty space ' ' (use the += operator for that). After the loop ends, result will have one trailing space at the end. Remove it using the method rstrip() before returning it.