args: Borrow string when printing it

Seems like a better default, unsure if it made any difference here
tho.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/args.rs b/src/args.rs
index 5081a15..919b41a 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -108,7 +108,7 @@ pub trait Parser {
         });
     }
 
-    fn print_help_fn(&self, options: &Options, println: &dyn Fn(String));
+    fn print_help_fn(&self, options: &Options, println: &dyn Fn(&String));
 }
 
 #[allow(dead_code)]
@@ -117,19 +117,19 @@ pub struct LongOnlyParser {}
 #[allow(dead_code)]
 pub struct ShortAndLongParser {}
 
-fn print_list(list: Vec<(String, &str)>, println: &dyn Fn(String)) {
+fn print_list(list: Vec<(String, &str)>, println: &dyn Fn(&String)) {
     let mut left_len: usize = 0;
     for (left, _) in &list {
         left_len = std::cmp::max(left_len, left.len());
     }
     for (left, right) in &list {
         let mut right_lines = right.split('\n');
-        println(format!(
+        println(&format!(
             "{left:<left_len$}  {}",
             right_lines.next().unwrap()
         ));
         for right_line in right_lines {
-            println(format!("{:<left_len$}  {right_line}", ""));
+            println(&format!("{:<left_len$}  {right_line}", ""));
         }
     }
 }
@@ -197,7 +197,7 @@ impl Parser for LongOnlyParser {
         Ok(Arguments { program, args: ret })
     }
 
-    fn print_help_fn(&self, options: &Options, println: &dyn Fn(String)) {
+    fn print_help_fn(&self, options: &Options, println: &dyn Fn(&String)) {
         let mut lines = Vec::new();
         for option in &options.options {
             let left = match option.value_req {
@@ -297,7 +297,7 @@ impl Parser for ShortAndLongParser {
         Ok(Arguments { program, args: ret })
     }
 
-    fn print_help_fn(&self, options: &Options, println: &dyn Fn(String)) {
+    fn print_help_fn(&self, options: &Options, println: &dyn Fn(&String)) {
         let mut lines = Vec::new();
         for option in &options.options {
             let left: String;