Fix rubocop offences

lib/ip_ranger/ip_address.rb

@@ -3,8 +3,8 @@
 
 module IPRanger
   class IPAddress < DelegateClass(IPAddr)
-    def self.from_integer(i, family, mask = nil)
-      address = IPAddr.new(i, family)
+    def self.from_integer(ipnum, family, mask = nil)
+      address = IPAddr.new(ipnum, family)
       address = address.mask(mask) if mask
 
       new(address)
@@ -41,7 +41,7 @@ def last
     private
 
     def mask_addr
-      __getobj__.instance_variable_get('@mask_addr')
+      __getobj__.instance_variable_get(:@mask_addr)
     end
   end
 end

lib/ip_ranger/ip_range.rb

@@ -69,7 +69,7 @@ def cidr_partition(target, exclude)
 
       target_first = target.first
       i_lower = target_first
-      i_upper = target_first + (2 ** (target_width - new_prefixlen))
+      i_upper = target_first + (2**(target_width - new_prefixlen))
 
       while exclude.prefixlen >= new_prefixlen
         if exclude.first >= i_upper
@@ -84,7 +84,7 @@ def cidr_partition(target, exclude)
         break if new_prefixlen > target_width
 
         i_lower = matched
-        i_upper = matched + (2 ** (target_width - new_prefixlen))
+        i_upper = matched + (2**(target_width - new_prefixlen))
       end
 
       [left, [exclude], right.reverse]

spec/ip_ranger/ip_range_spec.rb

@@ -82,7 +82,7 @@
   end
 
   it 'raises if given incompatible IP addresses' do
-    expect { described_class.new('192.168.1.1', '2001:0db8:0000:0042:0000:8a2e:0370:7334') }.
-      to raise_error('IP sequence cannot contain both IPv4 and IPv6!')
+    expect { described_class.new('192.168.1.1', '2001:0db8:0000:0042:0000:8a2e:0370:7334') }
+      .to raise_error('IP sequence cannot contain both IPv4 and IPv6!')
   end
 end