style(tags): improvements on tag component

packages/component-faraday-ui/src/AuthorCard.js

@@ -58,8 +58,8 @@ const AuthorTitle = ({
       <H3>{isNumber(listIndex) ? `#${listIndex + 1} Author` : 'Author'}</H3>
       {!editMode ? (
         <AuthorTags>
-          {isSubmitting && <Tag mr={1}>Submitting</Tag>}
-          {isCorresponding && <Tag mr={1}>Corresponding</Tag>}
+          {isSubmitting && <Tag mr={1}>SUBMITTING</Tag>}
+          {isCorresponding && <Tag mr={1}>CORRESPONDING</Tag>}
         </AuthorTags>
       ) : (
         <ValidatedField

packages/component-faraday-ui/src/AuthorTagList.js

@@ -56,7 +56,7 @@ const AuthorTagList = ({
             ? [prev, curr]
             : [
                 prev,
-                <Item key={curr} mr={1 / 4} />,
+                <Item key={`spacing-${curr}`} mr={1 / 4} />,
                 separator,
                 <span key={curr}>&nbsp;</span>,
                 curr,