TITLE: Vim HTML img tag to markdown
DATE: 2020-06-30
AUTHOR: John L. Godlee
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I was quite proud of myself for figuring this one out in only about 
2 minutes, in Vim. Starting with an HTML img tag:

    <img src="img/jetz_table.png" alt="Functional diversity 
measures" width="640">

And using this Vim regex:

    s/<img src="\(.\{-}\)".*alt="\(.\{-}\)".*/![\2](\1)/g

To create this Markdown formatted image link:

    ![Functional diversity measures](img/jetz_table.png)

This was my first proper outing using \{-} for non-greedy matching, 
used on the double quotes ". It also uses capture groups \(.{-}\) 
-> \1.