Unwanted newline after header in Markdown

Question

I am adding a ## (h2) header in Markdown and I want the following line to be directly under the header but there is an additional blank line between the Header and Line under.

Example (how it looks now):

Header

line after with a blank space under

I dont want that line after the Header line....

Answer 1

There is no "blank line". It's simply that the header has a bottom margin which makes it appear that a blank line exists. If you want no extra whitespace between the header and the line following it, just define some CSS which removes any margin:

h2 {
    margin: 0;
}

Note that the above rule applies only to <h2> headers. For all headers you can do:

h1, h2, h3, h4, h5, h6 {
    margin: 0;
}