doc: fix typos throughout docs and code

lib/encoder/encoder.go

@@ -2,7 +2,7 @@
 Translate file names for usage on restrictive storage systems
 
 The restricted set of characters are mapped to a unicode equivalent version
-(most to their FULLWIDTH variant) to increase compatability with other
+(most to their FULLWIDTH variant) to increase compatibility with other
 storage systems.
 See: http://unicode-search.net/unicode-namesearch.pl?term=FULLWIDTH
 

lib/encoder/internal/gen/main.go

@@ -600,7 +600,7 @@ func runePos(r rune, s []rune) int {
 	return -1
 }
 
-// quotedToString returns a string for the chars slice where a encoder.QuoteRune is
+// quotedToString returns a string for the chars slice where an encoder.QuoteRune is
 // inserted before a char[i] when quoted[i] is true.
 func quotedToString(chars []rune, quoted []bool) string {
 	var out strings.Builder