trailing lines and some cleanup

src/registrar/assets/sass/_theme/_admin.scss

@@ -179,4 +179,4 @@ h1, h2, h3 {
     text-align: left;
     background: var(--primary);
     color: var(--header-link-color);
-}
+}

src/registrar/assets/sass/_theme/_alerts.scss

@@ -14,4 +14,4 @@
       left: 1rem !important;
     }
   } 
-}
+}

src/registrar/assets/sass/_theme/_base.scss

@@ -124,4 +124,4 @@ abbr[title] {
 
 .flex-end {
   align-items: flex-end;
-}
+}

src/registrar/assets/sass/_theme/_buttons.scss

@@ -106,4 +106,4 @@ a.usa-button--unstyled:visited {
   position: relative;
   top: -39.2px;
   left: 88px;
-}
+}

src/registrar/assets/sass/_theme/_fieldsets.scss

@@ -7,4 +7,4 @@ fieldset {
 
 fieldset:not(:first-child) {
     margin-top: units(2);
-}
+}

src/registrar/assets/sass/_theme/_forms.scss

@@ -18,4 +18,4 @@
   margin-left: 0;
   padding-left: 0;
   border-left: none;
-}
+}

src/registrar/assets/sass/_theme/_register-form.scss

@@ -77,4 +77,4 @@
   color: color('primary-dark');
   font-weight: font-weight('semibold');
   margin-bottom: units(0.5);
-}
+}

src/registrar/assets/sass/_theme/_sidenav.scss

@@ -27,4 +27,4 @@
 
 .stepnav {
   margin-top: units(2);
-}
+}

src/registrar/assets/sass/_theme/_tables.scss

@@ -90,4 +90,4 @@
       border-top: none;
     }
   }
-}
+}

src/registrar/assets/sass/_theme/_typography.scss

@@ -21,4 +21,4 @@ h2 {
   line-height: line-height('heading', 3);
   margin: units(4) 0 units(1);
   color: color('primary-darker');
-}
+}

src/registrar/templates/includes/modal.html

@@ -39,4 +39,4 @@
             <use xlink:href="/assets/img/sprite.svg#close"></use>
         </svg>
     </button>
-</div>
+</div>

src/registrar/views/domain.py

@@ -241,7 +241,7 @@ class DomainDNSSECView(DomainPermissionView, FormMixin):
         
         has_dnssec_records = self.domain.dnssecdata is not None
                 
-        # Create HTML for the buttons
+        # Create HTML for the modal button
         modal_button = '<button type="submit" class="usa-button" name="disable_dnssec">Disable DNSSEC</button>'
 
         context['modal_button'] = modal_button