Revert rename of Div to Quot

src/test/compile-fail/eval-enum.rs

@@ -1,5 +1,5 @@
 enum test {
-    quot_zero = 1/0, //~ERROR expected constant: attempted quotient with a divisor of zero
+    div_zero = 1/0, //~ERROR expected constant: attempted to divide by zero
     rem_zero = 1%0  //~ERROR expected constant: attempted remainder with a divisor of zero
 }
 

src/test/run-fail/divide-by-zero.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern:attempted quotient with a divisor of zero
+// error-pattern:attempted to divide by zero
 fn main() {
     let y = 0;
     let z = 1 / y;