refactor: move trim to process function

Author: lmiller1990

src/mount.ts

@@ -236,7 +236,7 @@ export function mount(
 
         if (typeof slot === 'string') {
           // slot is most probably a scoped slot string or a plain string
-          acc[name] = (props: VNodeProps) => h(processSlot(slot.trim()), props)
+          acc[name] = (props: VNodeProps) => h(processSlot(slot), props)
           return acc
         }
 

src/utils/compileSlots.ts

@@ -1,7 +1,8 @@
 import { compile } from '@vue/compiler-dom'
 import * as vue from 'vue'
 
-export function processSlot(template = '', Vue = vue) {
+export function processSlot(source = '', Vue = vue) {
+  let template = source.trim()
   const hasWrappingTemplate = template && template.startsWith('<template')
 
   // allow content without `template` tag, for easier testing