Add support for empty alt text images

[orbikm]

• Support empty alt text in an image tag. e.g. ![](my-image.png)

• This fix simply modifies the link capture regex to conditionally scan for either explicitly an Image tag with empty braces, but not a Link with empty braces. Although a new capture group is added, it is discarded, so the group structure remains unaltered.

Issue: #13

[orbikm]

To interested developers, since this project seems unmaintained at this point, and had a few bugs that were preventing me from using it in production, I have created a replacement plugin, mkdocs-ezlinks-plugin.

It is currently in alpha while I sort out some minor bugs and add a few additional feature enhancements.

The following issues are addressed in mkdocs-ezlinks-plugin

• 2 Add more supported file types

• 6 Incorrect links between pages that are more than two levels deep

• 10 Add support for [[file]] and [[file#title]]

• 13 Blank Image ALtText does not get captured by this plugin

• 15 Assume that no extension means markdown

[DominikaK]

Please note that this currently results in the following error:

File "<...>\appdata\local\programs\python\python37-32\lib\site-packages\mkdocs_autolinks_plugin\plugin.py", line 15
    AUTOLINK_RE = r'(?:\!\[\]|\[([^\]]+)\])\((([^)/]+\.(md|png|jpg|jpeg|bmp|gif))(#.*)*)\)"
                                                                                          ^
SyntaxError: EOL while scanning string literal

presumably due to the unmatching single/double quotes in https://github.com/midnightprioriem/mkdocs-autolinks-plugin/pull/14/files#diff-4b4c0255135a5ee371839e4bc09886107e798b2f6654779aa135ded21daad8a0R15

[zachhannum]

Thanks for that. Fixed in f78aa02ba60af1dc3beb7a1ba31374b3728cbd42