Button: Fix the spacing with an icon

src/atoms/Button.svelte

@@ -4,20 +4,17 @@
     export let className = 'button'
     export let text = ''
 
-    // Wrap string's each letters into a span
-    // const textSpans = text
-    //     .replace(/(<.*?>)|(.)/g, letter => letter.replace(/./g, '<span>$&</span>'))
-    //     .replace(/ /g, '\u00a0')
+    const hasSlot = arguments[1].$$slots !== undefined
 </script>
 
 {#if type === 'button'}
-<button class={className} data-text={text}>
+<button class={className} class:button-icon={hasSlot} data-text={text}>
     <slot></slot>
     <span>{text}</span>
 </button>
 
 {:else}
-<a {href} class={className} data-text={text}>
+<a {href} class={className} class:button-icon={hasSlot} data-text={text}>
     <slot></slot>
     <span>{text}</span>
 </a>