Fix docstring indentation issue in ext.i18n.form
Fix docstring indentation issue in ext.i18n.form

pawl/wtforms,pawl/wtforms,wtforms/wtforms,cklein/wtforms,hsum/wtforms,crast/wtforms,skytreader/wtforms,Aaron1992/wtforms,Xender/wtforms,Aaron1992/wtforms,subyraman/wtforms,jmagnusson/wtforms