linux - sed:用空格替换 <p> </p> 中的换行符

Question

假设我有文件:index.html

index.html

<p class="p">This
entry will determine the number of transmit threads, each channel
represents one thread, which can handle multiple multicast ports.
All channels are enabled by default. To temporarily disable a particular
channel, use the folowing configuration lines:</p>

如何仅在

标记内将换行符替换为空格

例如，将index.html更改为:

<p class="p">This entry will determine the number of transmit threads, each channel represents one thread, which can handle multiple multicast ports. All channels are enabled by default. To temporarily disable a particular channel, use the folowing configuration lines:</p>`

尝试过，

sed -e "/<p>/s/\n/ /g" index.html

不工作

Answer 1

使用gnu-sed:

sed -E '/<p class="p">/{:a; N; s/\n/ /g; /<\/p>/!ba;}' index.html