Lint: Fix Lint cops

lib/money/bank/variable_exchange.rb

@@ -112,7 +112,7 @@ def exchange_with(from, to_currency, &)
         if from.currency == to_currency
           from
         else
-          if rate = get_rate(from.currency, to_currency)
+          if (rate = get_rate(from.currency, to_currency))
             fractional = calculate_fractional(from, to_currency)
             from.dup_with(
               fractional: exchange(fractional, rate, &),
@@ -175,7 +175,7 @@ def add_rate(from, to, rate)
       #   bank = Money::Bank::VariableExchange.new
       #   bank.set_rate("USD", "CAD", 1.24515)
       #   bank.set_rate("CAD", "USD", 0.803115)
-      def set_rate(from, to, rate, opts = {})
+      def set_rate(from, to, rate, _opts = {})
         store.add_rate(Currency.wrap(from).iso_code, Currency.wrap(to).iso_code, rate)
       end
 
@@ -196,7 +196,7 @@ def set_rate(from, to, rate, opts = {})
       #
       #   bank.get_rate("USD", "CAD") #=> 1.24515
       #   bank.get_rate("CAD", "USD") #=> 0.803115
-      def get_rate(from, to, opts = {})
+      def get_rate(from, to, _opts = {})
         store.get_rate(Currency.wrap(from).iso_code, Currency.wrap(to).iso_code)
       end
 
@@ -219,7 +219,7 @@ def get_rate(from, to, opts = {})
       #
       #   s = bank.export_rates(:json)
       #   s #=> "{\"USD_TO_CAD\":1.24515,\"CAD_TO_USD\":0.803115}"
-      def export_rates(format, file = nil, opts = {})
+      def export_rates(format, file = nil, _opts = {})
         raise Money::Bank::UnknownRateFormat unless RATE_FORMATS.include?(format)
 
         store.transaction do
@@ -259,7 +259,7 @@ def rates
       #
       #   bank.get_rate("USD", "CAD") #=> 1.24515
       #   bank.get_rate("CAD", "USD") #=> 0.803115
-      def import_rates(format, string, opts = {})
+      def import_rates(format, string, _opts = {})
         raise Money::Bank::UnknownRateFormat unless RATE_FORMATS.include?(format)
 
         if format == :ruby

lib/money/currency/heuristics.rb

@@ -3,7 +3,7 @@
 class Money
   class Currency
     module Heuristics
-      def analyze(str)
+      def analyze(_str)
         raise StandardError, 'Heuristics deprecated, add `gem "money-heuristics"` to Gemfile'
       end
     end

lib/money/locale_backend/i18n.rb

@@ -14,6 +14,8 @@ class I18n < Base
 
       def initialize
         raise NotSupported, 'I18n not found' unless defined?(::I18n)
+
+        super
       end
 
       def lookup(key, _)

lib/money/money.rb

@@ -242,6 +242,8 @@ def self.setup_defaults
 
   def self.inherited(base)
     base.setup_defaults
+
+    super
   end
 
   setup_defaults

lib/money/money/arithmetic.rb

@@ -77,6 +77,7 @@ def <=>(other)
       other = other.exchange_to(currency)
       fractional <=> other.fractional
     rescue Money::Bank::UnknownRate
+      nil
     end
 
     # Uses Comparable's implementation but raises ArgumentError if non-zero

lib/money/money/formatter.rb

@@ -262,7 +262,7 @@ def append_sign(formatted_number)
           .gsub('%u', [sign_before, symbol_value].join)
           .gsub('%n', [sign, formatted_number].join)
       else
-        formatted_number = "#{sign_before}#{sign}#{formatted_number}"
+        "#{sign_before}#{sign}#{formatted_number}"
       end
     end
 

spec/money/arithmetic_spec.rb

@@ -56,11 +56,13 @@
       expect(Money.new(1, "USD")).not_to eq 0
     end
 
+    # rubocop:disable Lint/FloatComparison
     it 'raises error for non-zero numerics' do
       expect { Money.new(1_00, "USD") == 1 }.to raise_error ArgumentError
       expect { Money.new(1_00, "USD") == -2.0 }.to raise_error ArgumentError
       expect { Money.new(1_00, "USD") == Float::INFINITY }.to raise_error ArgumentError
     end
+    # rubocop:enable Lint/FloatComparison
   end
 
   describe "#eql?" do
@@ -110,6 +112,7 @@
       end
     end
 
+    # rubocop:disable Lint/FloatComparison
     it "returns false if used to compare with an object that doesn't inherit from Money" do
       expect(Money.new(1_00, "USD").eql?(Object.new)).to be false
       expect(Money.new(1_00, "USD").eql?(Class)).to      be false
@@ -120,6 +123,7 @@
       expect(Money.new(1_00, "USD").eql?(1)).to          be false
       expect(Money.new(1_00, "USD").eql?(1_00)).to       be false
     end
+    # rubocop:enable Lint/FloatComparison
 
     it "can be used to compare with an object that inherits from Money" do
       klass = Class.new(Money)

spec/money/formatting_spec.rb

@@ -340,7 +340,7 @@
         expect(Money.new(100, "SEK").format(symbol: true)).to eq "1,00 kr"
       end
 
-      specify "(symbol: "", nil or false) returns the amount without a symbol" do
+      specify "(symbol: \"\", nil or false) returns the amount without a symbol" do
         money = Money.new(100, "GBP")
         expect(money.format(symbol: "")).to eq "1.00"
         expect(money.format(symbol: nil)).to eq "1.00"