Markdown code block closing incorrectly

[thephez]

If any spaces immediately following the ``` that should end a code block, it is not closed properly and it will include the subsequent code block section(s) in the document. It acts as if the the rendering engine only looks for a terminating line break immediately after the last grave accent. Perhaps trailing spaces should be trimmed before determining if it is a single code block or multiples.

This example shows how the rendering is affected with/without a trailing space: https://dashcore-anchortest.readme.io/docs/merged-code-block

[rafegoldberg]

@thephez fantastic catch. I believe the issue is with the underlying regex that we use to capture tabbed versus standard single code blocks.

https://github.com/readmeio/api-explorer/blob/4e08a616781a533bcee2bfe4a05e161426c8385a/packages/markdown/processor/parse/flavored/code-tabs.js#L1

(Also, I should note that I really appreciate the demo link.)