怎么在editplus中使用正则表达式替换句子和合并句子?

怎么在editplus中使用正则表达式替换句子和合并句子?
段落和段落之间用“|”隔开,每两段合并为一段的意思.每段一行,每两段另起一行.
查找{ what's that }
{l don't know!}
{ what's that }
{l don't know!}
替换 {{ what's that }|{l don't know!}}
{{ what's that }|{l don't know!}}
查找{ what's that }
{l don't know!}
{you are right,ok!}
{don't worry,just do it.}
替换{{ what's that }| {l don't know!}|{you are right,ok!}| {don't worry,just do it.}}
因为是批量,所以下面还有很多类似的句子不做演示,我会另起一行分割,或者用分割线分割,怎么替换句子到分割线为止的句子合并成一个句子