Fix linter issues

src/ComplaintDetail.jsx

@@ -76,7 +76,7 @@ export class ComplaintDetail extends React.Component {
     return (
       <button className="a-btn a-btn__link"
               onClick={this.props.onClickedBack}>
-          { iconMap.getIcon('left', 'cf-icon-left') }
+          { iconMap.getIcon( 'left', 'cf-icon-left' ) }
           Back to search results
       </button>
     )
@@ -87,7 +87,7 @@ export class ComplaintDetail extends React.Component {
     return (
       <button className="a-btn a-btn__link"
               onClick={() => { window.location = root }}>
-          { iconMap.getIcon('left', 'cf-icon-left') }
+          { iconMap.getIcon( 'left', 'cf-icon-left' ) }
           Go to search home page
       </button>
     )
@@ -104,7 +104,8 @@ export class ComplaintDetail extends React.Component {
         <span className="cf-icon__before">
           { iconMap.getIcon(
             'clock-round',
-            'cf-icon-clock-round' + ( value.toLowerCase() === 'no' ? ' not-timely' : '' )
+            'cf-icon-clock-round' +
+            ( value.toLowerCase() === 'no' ? ' not-timely' : '' )
           ) }
         </span>
         <span className="body-copy">{ value }</span>

src/iconMap.jsx

@@ -18,6 +18,12 @@ const iconMap = {
   'warning-round': <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1200" className="cf-icon-svg"><path d="M500 105.2c-276.1 0-500 223.9-500 500s223.9 500 500 500 500-223.9 500-500-223.9-500-500-500zm-49.7 234.6c0-27.6 22.4-50 50-50s50 22.4 50 50v328.6c0 27.6-22.4 50-50 50s-50-22.4-50-50V339.8zm50 582.5c-39.6 0-71.7-32.1-71.7-71.7s32.1-71.7 71.7-71.7S572 811 572 850.6s-32.1 71.7-71.7 71.7z"></path></svg>
 }
 
+/**
+ * Retrieve an SVG icon given it's name.
+ * @param {string} name - A cf-icon SVG canonical icon name.
+ * @param {string} customClass - A custom CSS class name to add to an icon.
+ * @returns {Object} An SVG icon markup.
+ */
 function getIcon( name, customClass ) {
   let Icon = iconMap[name];
   if ( typeof Icon === 'undefined' ) {