Correct `Lint/SymbolConversion` offenses.
Correct `Lint/SymbolConversion` offenses.

tejasbubane/rubocop,bbatsov/rubocop,maxjacobson/rubocop,rrosenblum/rubocop,bbatsov/rubocop,rrosenblum/rubocop,rrosenblum/rubocop,tejasbubane/rubocop,tejasbubane/rubocop,maxjacobson/rubocop,maxjacobson/rubocop