Fixed the bug where examples found by hiragana reading were not highligh...

For examples, that are found via the hiragana reading in round brackets, the corresponding kanzi was not highlighted. I have fixed this, so that the words are properly highlighted in red.

Example:
For expression "れい", an example sentence "これで彼の霊も浮かばれるだろう。" will be pulled, as the color_example includes "霊(れい)", but "霊" is not highlighted.
With the fix, it properly shows the sentence with "霊" highlighted in red.