[wp-trac] [WordPress Trac] #34939: Shortcode regex no longer matches [shortcode=XXX]

[WordPress Trac]

#34939: Shortcode regex no longer matches [shortcode=XXX]
--------------------------+--------------------
 Reporter:  kraftbj       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  4.4.1
Component:  Shortcodes    |     Version:  4.4
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by kraftbj):

 Another notable thing. At least with Jetpack's YouTube shortcode. If you
 have the broken style in a post by itself, it fails. If you put the broken
 style, followed by one with a space, both of them work.

 Fails:
 {{{
 [youtube=https://youtu.be/IGrqiSYc1oM&w=600&h=440]
 }}}

 Both are rendered:
 {{{
 [youtube=https://youtu.be/IGrqiSYc1oM&w=600&h=440]
 [youtube url=https://youtu.be/IGrqiSYc1oM&w=600&h=440]
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/34939#comment:8>
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