all: ~500 more byte=>u8

vlib/strconv/format.v

@@ -80,7 +80,7 @@ Single format functions
 */
 pub struct BF_param {
 pub mut:
-	pad_ch       byte = u8(` `) // padding char
+	pad_ch       u8   = u8(` `) // padding char
 	len0         int  = -1 // default len for whole the number or string
 	len1         int  = 6 // number of decimal digits, if needed
 	positive     bool = true // mandatory: the sign of the number passed