Kata

Implement a function, so it will produce a sentence out of the given parts.

Array of parts could contain:

• words;
  
• commas in the middle;
  
• multiple periods at the end.
  

Sentence making rules:

• there must always be a space between words;
  
• there must not be a space between a comma and word on the left;
  
• there must always be one and only one period at the end of a sentence.
  

Example:

makeSentence(['hello', ',', 'my', 'dear']) // returns 'hello, my dear.'

makeSentence ['hello', ',', 'my', 'dear'] # returns 'hello, my dear.'

make_sentence ['hello', ',', 'my', 'dear'] # returns 'hello, my dear.'