Github user alpinegizmo commented on the issue:
https://github.com/apache/flink/pull/3857
@greghogan Yes, I think we should use spaces rather than tabs in code
samples in the docs -- and fewer than 8. I looked around at all of the code in
the docs, and made sure that all of it is now inside of a code highlighting
block. I only changed indentation in cases where it really bothered me. Making
the indentation 100% consistent didn't seem worth the trouble, and wouldn't
very enforceable going forward (unless the highlight plugin is capable of doing
the indentation for us).
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