Syntax for specs adjusted for consistency reasons

is_expected.to has been replaced by should
is_expected.not_to has been replaced by should_not

spec/models/proposal_executed_dashboard_action_spec.rb

@@ -17,24 +17,24 @@ describe ProposalExecutedDashboardAction do
   let(:executed_at) { Time.current }
   let(:comments) { '' }
 
-  it { is_expected.to be_valid }
+  it { should be_valid }
 
   context 'when proposal is nil' do
     let(:proposal) { nil }
 
-    it { is_expected.not_to be_valid }
+    it { should_not be_valid }
   end
 
   context 'when proposal_dashboard_action is nil' do
     let(:proposal_dashboard_action) { nil }
 
-    it { is_expected.not_to be_valid }
+    it { should_not be_valid }
   end
 
   context 'when executed_at is nil' do
     let(:executed_at) { nil }
 
-    it { is_expected.not_to be_valid }
+    it { should_not be_valid }
   end
 
   context 'when the action sends a request to the administrators' do
@@ -43,19 +43,19 @@ describe ProposalExecutedDashboardAction do
     context 'and comments are blank' do
       let(:comments) { '' }
 
-      it { is_expected.not_to be_valid }
+      it { should_not be_valid }
     end
 
     context 'and comments have value' do
       let(:comments) { Faker::Lorem.sentence }
 
-      it { is_expected.to be_valid }
+      it { should be_valid }
     end
   end
 
   context 'when it has been already executed' do
     let!(:executed) { create(:proposal_executed_dashboard_action, proposal: proposal, proposal_dashboard_action: proposal_dashboard_action) }
 
-    it { is_expected.not_to be_valid }
+    it { should_not be_valid }
   end
 end