Fix typos in README and impl_fmt.rs

README.md

@@ -87,9 +87,9 @@ use serde_json;
 #[derive(Debug,Serialize,Deserialize)]
 struct MyStruct {
     name: String,
-    // this will be witten to json as string
+    // this will be written to json as string
     value: BigDecimal,
-    // this will be witten to json as number
+    // this will be written to json as number
     #[serde(with = "bigdecimal::serde::json_num")]
     number: BigDecimal,
 }

src/impl_fmt.rs

@@ -128,7 +128,7 @@ fn format_full_scale(
     debug_assert_ne!(digits.len(), 0);
 
     if this.scale <= 0 {
-        // formating an integer value (add trailing zeros to the right)
+        // formatting an integer value (add trailing zeros to the right)
         zero_right_pad_integer_ascii_digits(&mut digits, &mut exp, f.precision());
     } else {
         let scale = this.scale as usize;