Ja: remove space just before punctuation

Punctuation mark is a word boundary but not good to insert space.

"日本語が読めます。"
becomes           "Nihongo ga yomemasu<space>."
But it should be "Nihongo ga yomemasu."

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
Merge pull request #2 from miurahr/jskakasi_punctuation

Ja: remove space just before punctuation