fix(multiple): incosistent item text truncation when used together with MDC list

src/material-experimental/mdc-core/option/optgroup.scss

@@ -19,4 +19,10 @@
     // we can't use directly, because it comes with some selectors.
     opacity: mdc-list-variables.$content-disabled-opacity;
   }
+
+  // Needs to be overwritten explicitly, because the style can
+  // leak in from the list and cause the text to truncate.
+  .mdc-list-item__primary-text {
+    white-space: normal;
+  }
 }

src/material-experimental/mdc-core/option/option.scss

@@ -65,6 +65,12 @@
     // Pointer events can be safely disabled because the ripple trigger element is the host element.
     pointer-events: none;
   }
+
+    // Needs to be overwritten explicitly, because the style can
+  // leak in from the list and cause the text to truncate.
+  .mdc-list-item__primary-text {
+    white-space: normal;
+  }
 }
 
 .mat-mdc-option-active {

src/material-experimental/mdc-menu/menu.scss

@@ -78,6 +78,12 @@ mat-menu {
     }
   }
 
+  // Needs to be overwritten explicitly, because the style can
+  // leak in from the list and cause the text to truncate.
+  .mdc-list-item__primary-text {
+    white-space: normal;
+  }
+
   @include a11y.high-contrast(active, off) {
     $outline-width: 1px;