Disallow invalid inline style comments in stylesheets (#9099)

res/css/views/dialogs/_DevtoolsDialog.pcss

@@ -133,13 +133,13 @@ limitations under the License.
         border-collapse: collapse;
 
         th {
-            // Colour choice: first one autocomplete gave me.
+            /* Colour choice: first one autocomplete gave me. */
             border-bottom: 1px solid $accent;
             text-align: left;
         }
 
         td, th {
-            width: 360px; // "feels right" number
+            width: 360px; /* "feels right" number */
 
             text-overflow: ellipsis;
             overflow: hidden;
@@ -151,7 +151,7 @@ limitations under the License.
         }
 
         tr:hover {
-            // Colour choice: first one autocomplete gave me.
+            /* Colour choice: first one autocomplete gave me. */
             background-color: $accent;
         }
     }
@@ -178,8 +178,8 @@ limitations under the License.
 }
 
 .mx_DevTools_SettingsExplorer_setting {
-    // override default link button color
-    // as it is the same as the background highlight
-    // used on focus
+    /* override default link button color */
+    /* as it is the same as the background highlight */
+    /* used on focus */
     color: $links !important;
 }