chore: fix comment typo (vuejs#6573)

samayo · ztlevi · commit 86847770a2bf · 2018-02-14T10:49:25.000-08:00
correct "a input" to "an input"
diff --git a/dist/vue.js b/dist/vue.js
@@ -83,7 +83,7 @@ function toString (val) {
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 function toNumber (val) {

Original file line number	Diff line number	Diff line change
`@@ -83,7 +83,7 @@ function toString (val) {`
`83`	`83`	`}`
`84`	`84`
`85`	`85`	`/**`
`86`		`- * Convert a input value to a number for persistence.`
	`86`	`+ * Convert an input value to a number for persistence.`
`87`	`87`	`* If the conversion fails, return original string.`
`88`	`88`	`*/`
`89`	`89`	`function toNumber (val) {`