Grammar mistake

Fixed a small grammar mistake

Author: Abdullah8006

src/conversion/string.md

@@ -33,7 +33,7 @@ approach to this is to use the [`parse`] function and either to arrange for
 type inference or to specify the type to parse using the 'turbofish' syntax.
 Both alternatives are shown in the following example.
 
-This will convert the string into the type specified so as long as the [`FromStr`]
+This will convert the string into the type specified as long as the [`FromStr`]
 trait is implemented for that type. This is implemented for numerous types
 within the standard library. To obtain this functionality on a user defined type
 simply implement the [`FromStr`] trait for that type.