Unfudge writes X fields tests

Providing a `limit` argument to `split` was a fudge...

Also split examples to fix some rubocop `RSpec/MultipleExpectations`
violations.

spec/unit/provider/network_route/redhat_spec.rb

@@ -134,9 +134,12 @@ def fixture_data(file)
 
     describe 'writing the route line' do
       describe 'For standard (non-default) routes' do
-        it 'writes 5 fields' do
+        it 'writes a single line for the route' do
           expect(content.scan(%r{^172.17.67.0\/30 .*$}).length).to eq(1)
-          expect(content.scan(%r{^172.17.67.0\/30 .*$}).first.split(' ', 5).length).to eq(5)
+        end
+
+        it 'writes 7 fields' do
+          expect(content.scan(%r{^172.17.67.0\/30 .*$}).first.split(' ').length).to eq(7)
         end
 
         it 'has the correct fields appended' do

spec/unit/provider/network_route/routes_spec.rb

@@ -114,9 +114,11 @@ def fixture_data(file)
     end
 
     describe 'writing the route line' do
-      it 'writes all 5 fields' do
+      it 'writes a single line for the route' do
         expect(content.scan(%r{^172.17.67.0 .*$}).length).to eq(1)
-        expect(content.scan(%r{^172.17.67.0 .*$}).first.split(%r{\s}, 5).length).to eq(5)
+      end
+      it 'writes all 6 fields' do
+        expect(content.scan(%r{^172.17.67.0 .*$}).first.split(' ').length).to eq(6)
       end
 
       it 'has the correct fields appended' do
@@ -166,9 +168,12 @@ def fixture_data(file)
     end
 
     describe 'writing the route line' do
-      it 'writes only fields' do
+      it 'writes a single line for the route' do
         expect(content.scan(%r{^172.17.67.0 .*$}).length).to eq(1)
-        expect(content.scan(%r{^172.17.67.0 .*$}).first.split(%r{\s}, 5).length).to eq(4)
+      end
+
+      it 'writes only fields' do
+        expect(content.scan(%r{^172.17.67.0 .*$}).first.split(' ').length).to eq(4)
       end
 
       it 'has the correct fields appended' do