fix issue that interger 1000001 is written as 1000000

Author: Yidong Wei

src/css-parsing-tests/component_value_list.json

@@ -223,7 +223,7 @@
 	["error", "bad-url"]
 ],
 
-"12 +34 -45 .67 +.89 -.01 2.3 +45.0 -0.67", [
+"12 +34 -45 .67 +.89 -.01 2.3 +45.0 -0.67 1000001", [
 	["number", "12", 12, "integer"], " ",
 	["number", "+34", 34, "integer"], " ",
 	["number", "-45", -45, "integer"], " ",
@@ -232,7 +232,8 @@
 	["number", "-0.01", -0.01, "number"], " ",
 	["number", "2.3", 2.3, "number"], " ",
 	["number", "+45.0", 45, "number"], " ",
-	["number", "-0.67", -0.67, "number"]
+	["number", "-0.67", -0.67, "number"], " ",
+	["number", "1000001", 1000001, "integer"]
 ],
 
 "12e2 +34e+1 -45E-0 .68e+3 +.79e-1 -.01E2 2.3E+1 +45.0e6 -0.67e0", [

src/serializer.rs

@@ -45,7 +45,15 @@ where
             scientific: false,
         }
     } else {
-        dtoa_short::write(dest, value)?
+        if let Some(int_val) = int_value {
+            write!(dest, "{}", int_val)?;
+            Notation {
+                decimal_point: false,
+                scientific: false,
+            }
+        } else {
+            dtoa_short::write(dest, value)?
+        }
     };
 
     if int_value.is_none() && value.fract() == 0. && !notation.decimal_point && !notation.scientific