Replaces it "should xx" by it "xxs" in comment_spec

spec/models/comment_spec.rb

@@ -4,7 +4,7 @@ describe Comment do
 
   let(:comment) { build(:comment) }
 
-  it "should be valid" do
+  it "is valid" do
     expect(comment).to be_valid
   end
 
@@ -18,7 +18,7 @@ describe Comment do
   end
 
   describe "#as_administrator?" do
-    it "should be true if comment has administrator_id, false otherway" do
+    it "is true if comment has administrator_id, false otherway" do
       expect(comment).not_to be_as_administrator
 
       comment.administrator_id = 33
@@ -28,7 +28,7 @@ describe Comment do
   end
 
   describe "#as_moderator?" do
-    it "should be true if comment has moderator_id, false otherway" do
+    it "is true if comment has moderator_id, false otherway" do
       expect(comment).not_to be_as_moderator
 
       comment.moderator_id = 21
@@ -40,27 +40,27 @@ describe Comment do
   describe "cache" do
     let(:comment) { create(:comment) }
 
-    it "should expire cache when it has a new vote" do
+    it "expires cache when it has a new vote" do
       expect { create(:vote, votable: comment) }
       .to change { comment.updated_at }
     end
 
-    it "should expire cache when hidden" do
+    it "expires cache when hidden" do
       expect { comment.hide }
       .to change { comment.updated_at }
     end
 
-    it "should expire cache when the author is hidden" do
+    it "expires cache when the author is hidden" do
       expect { comment.user.hide }
       .to change { [comment.reload.updated_at, comment.author.updated_at] }
     end
 
-    it "should expire cache when the author changes" do
+    it "expires cache when the author changes" do
       expect { comment.user.update(username: "Isabel") }
       .to change { [comment.reload.updated_at, comment.author.updated_at] }
     end
 
-    it "should expire cache when the author's organization get verified" do
+    it "expires cache when the author's organization get verified" do
       create(:organization, user: comment.user)
       expect { comment.user.organization.verify }
       .to change { [comment.reload.updated_at, comment.author.updated_at] }