Added/Corrected Documentation

MathPad/MPToken.m

@@ -10,11 +10,17 @@
 
 
 
-@implementation MPToken {
-    NSRange _range;
-    MPTokenType _tokenType;
-    NSString *_stringValue;
-}
+@interface MPToken ()
+
+@property (readonly, nonatomic) NSRange range;
+@property (readonly, nonatomic, strong) NSString *stringValue;
+@property (readonly, nonatomic) MPTokenType tokenType;
+
+@end
+
+
+
+@implementation MPToken
 
 - (instancetype)initWithTokenType:(MPTokenType)tokenType
                             range:(NSRange)range
@@ -30,24 +36,6 @@
 }
 
 
-- (NSRange)range
-{
-    return _range;
-}
-
-
-- (MPTokenType)tokenType
-{
-    return _tokenType;
-}
-
-
-- (NSString *)stringValue
-{
-    return _stringValue;
-}
-
-
 - (NSString *)description
 {
     return self.stringValue;