一、标題
1.1 類 Setext 形式
類 Setext 形式是用底線的形式,利用 = (最高階标題)和 - (第二階标題),例如:
This is an H1
======= ======
This is an H2
----------- ---------------
六個點
This is an H1
==========
This is an H2
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每一行都加縮進
This is an H1
==========
This is an H2
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