gopherage/pkg/cov/util.go
func blocksEqual(a cover.ProfileBlock, b cover.ProfileBlock) bool {
	return a.StartCol == b.StartCol && a.StartLine == b.StartLine &&
		a.EndCol == b.EndCol && a.EndLine == b.EndLine && a.NumStmt == b.NumStmt
}
func blocksEqual(a cover.ProfileBlock, b cover.ProfileBlock) bool {
	return a.StartCol == b.StartCol && a.StartLine == b.StartLine &&
		a.EndCol == b.EndCol && a.EndLine == b.EndLine && a.NumStmt == b.NumStmt
}
// blocksEqual returns true if the blocks refer to the same code, otherwise false.
// It does not care about Count.