Proposal: Minimize adjacent whitespace changes on struct layout edits.

With current gofmt rules slight changes to a struct declaration make for
avalanche changes across declaration whitespace due to gofmt trying to layout
struct declaration "pretty". Produced changeset size make diffs unreadable
if any field identifier or type changes its length.

  1. Fix relative indent position of the type of the field, then
  2. Let code author hint gofmt where comments should line up.

Comment-start hint has a form of a "/<" digraph (slash, less-than) put into
the comment that follows the opening brace of the block.

https://github.com/golang/go/issues/37299

-- 
Wojciech S. Czarnecki
 << ^oo^ >> OHIR-RIPE

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