Handle quotation mark

[takahi-i]

If the left quotation mark is registered as the same as right quotation mark, they cannot be distinguished.

For example if we have the following settings, DocumentValidator thinks left quotation mark '"' needs not only before space but also after space.

<character name="LEFT_DOUBLE_QUOTATION_MARK" value="\'"  before-space="true" />
<character name="RIGHT_DOUBLE_QUOTATION_MARK" value="\'" after-space="true" />  

[takahi-i]

InvalidCharacterValidator cannot handle the quotation mark with spaces problem as this topic.

One solution could be that we creates a new validator which just handle quotation marks named QuotationMarkValidator which takes left and right spaces into considerations.

[takahi-i]

If I creates QuotationMarkValidator, it would be a good idea to remove quotation marks from character tables since character based validators cannot solve the quotation mark problems..

[takahi-i]

Another idea is that Add non left or right QuotationMark in the character table and configure the preference in the QuotationMarkValidator. The configuration could be as follows.

<QuotationMarkValidator>
  <property name="use-same-single-quotation" value="true">
</QuotationMarkValidator>

[takahi-i]

Decided to change default characters of quotations into non ascii characters. If users uses QuotationValidator for checking ascii quotation marks such as ' or " (these quotation mark does not have left and right variations) , users add the property use-acii.

<QuotationMarkValidator>
   <property name="use-acii" value="true">
</QuotationMarkValidator>

[takahi-i]

fixes with #26