Fixed Comment Describing Children Deletion

[mechPenSketch]

I've found a repeated comment while working on one of my issues. This change elaborates on the comment above incDeleteChildrenWithHistory(Node[] ns) that multiple children would be deleted, rather than a single child.

[r888800009]

why not try refactoring the code? These two functions are almost the same

[r888800009]

I think delete node would be better than delete children

[mechPenSketch]

why not try refactoring the code? These two functions are almost the same

The code isn't the problem. The comment describing the function is. incDeleteChildrenWithHistory(Node[] ns) has the exact same description as incDeleteChildWithHistory(Node n), so I changed "child" to "multiple children" to differentiate between them in how many nodes they affect.

[r888800009]

@mechPenSketch
This is true, but I would suggest doing more, like splitting the code into a function. This would contribute a bit more than just modifying comments.