Remove unneeded pub

exercises/13_error_handling/errors1.rs

@@ -8,7 +8,7 @@ fn main() {
     // You can optionally experiment here.
 }
 
-pub fn generate_nametag_text(name: String) -> Option<String> {
+fn generate_nametag_text(name: String) -> Option<String> {
     if name.is_empty() {
         // Empty names aren't allowed.
         None

exercises/13_error_handling/errors2.rs

@@ -16,7 +16,7 @@
 
 use std::num::ParseIntError;
 
-pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
+fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
     let processing_fee = 1;
     let cost_per_item = 5;
     let qty = item_quantity.parse::<i32>();

exercises/13_error_handling/errors3.rs

@@ -18,7 +18,7 @@ fn main() {
     }
 }
 
-pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
+fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
     let processing_fee = 1;
     let cost_per_item = 5;
     let qty = item_quantity.parse::<i32>()?;