[editor] Fix spaces on sub and sup elements in cloze

Turns out the space within the template code are doing this.

#270

projects/common/components/compound-elements/cloze/cloze.component.ts

@@ -144,22 +144,14 @@ import { ClozeElement } from 'common/models/elements/compound-elements/cloze/clo
         <ng-container *ngIf="$any(subPart).type === 'text' &&
                              (!(subPart.marks | markList).includes('superscript')) &&
                              (!(subPart.marks | markList).includes('subscript'))">
-          <span [ngStyle]="subPart.marks | styleMarks">
-            {{subPart.text}}
-          </span>
+          <span [ngStyle]="subPart.marks | styleMarks">{{subPart.text}}</span>
         </ng-container>
-
         <ng-container *ngIf="$any(subPart).type === 'text' && (subPart.marks | markList).includes('superscript')">
-          <sup [ngStyle]="subPart.marks | styleMarks">
-            {{subPart.text}}
-          </sup>
+          <sup [ngStyle]="subPart.marks | styleMarks">{{subPart.text}}</sup>
         </ng-container>
         <ng-container *ngIf="$any(subPart).type === 'text' && (subPart.marks | markList).includes('subscript')">
-          <sub [ngStyle]="subPart.marks | styleMarks">
-            {{subPart.text}}
-          </sub>
+          <sub [ngStyle]="subPart.marks | styleMarks">{{subPart.text}}</sub>
         </ng-container>
-
         <ng-container *ngIf="$any(subPart).type === 'image'">
           <img [src]="subPart.attrs.src" [alt]="subPart.attrs.alt"
                [style.display]="'inline-block'"