Remove needless comments.
Merge branch 'comment/remove-needless'
"First" of the left node is -1 and "Sibling" of the only child node is -1.
Find the locus node within "(*Predictor).Predict".
"(*Trie).Char" is used for the charactor which the node has.
Generates completion candidates with the given context words and prefix.
All found nodes are pushed to the priority queue.
Fix: Get the recierver's "childSeq".
Cosmetic change:
Remove "println".
Fix: "(*Predictor".getFirst" returns "nil" and "false" if the parent node is "nil".
Remove "println".
Merge branch 'feature/generate-canididates'