clippy: Remove needless borrows.

examples/01a_quick_example.rs

@@ -64,7 +64,7 @@ fn main() {
 
     // You can check for the existence of subcommands, and if found use their
     // matches just as you would the top level app
-    if let Some(ref matches) = matches.subcommand_matches("test") {
+    if let Some(matches) = matches.subcommand_matches("test") {
         // "$ myapp test" was run
         if matches.is_present("list") {
             // "$ myapp test -l" was run

examples/01b_quick_example.rs

@@ -78,7 +78,7 @@ fn main() {
 
     // You can check for the existence of subcommands, and if found use their
     // matches just as you would the top level app
-    if let Some(ref matches) = matches.subcommand_matches("test") {
+    if let Some(matches) = matches.subcommand_matches("test") {
         // "$ myapp test" was run
         if matches.is_present("list") {
             // "$ myapp test -l" was run

examples/04_using_matches.rs

@@ -42,7 +42,7 @@ fn main() {
 
     // If we wanted to some custom initialization based off some configuration file provided
     // by the user, we could get the file (A string of the file)
-    if let Some(ref file) = matches.value_of("config") {
+    if let Some(file) = matches.value_of("config") {
         println!("Using config file: {}", file);
     }
 

examples/06_positional_args.rs

@@ -48,7 +48,7 @@ fn main() {
     }
 
     // We can also get the values for those arguments
-    if let Some(ref in_file) = matches.value_of("input") {
+    if let Some(in_file) = matches.value_of("input") {
         // It's safe to call unwrap() because of the required options we set above
         println!("Doing work with {} and {}", in_file, matches.value_of("config").unwrap());
     }

examples/07_option_args.rs

@@ -49,7 +49,7 @@ fn main() {
     //
     // NOTE: If we specified multiple(), this will only return the _FIRST_
     // occurrence
-    if let Some(ref in_file) = matches.value_of("input") {
+    if let Some(in_file) = matches.value_of("input") {
         println!("An input file: {}", in_file);
     }
 

examples/08_subcommands.rs

@@ -41,7 +41,7 @@ fn main() {
     }
 
     // You can get the independent subcommand matches (which function exactly like App matches)
-    if let Some(ref matches) = matches.subcommand_matches("add") {
+    if let Some(matches) = matches.subcommand_matches("add") {
         // Safe to use unwrap() because of the required() option
         println!("Adding file: {}", matches.value_of("input").unwrap());
     }

examples/18_builder_macro.rs

@@ -41,7 +41,7 @@ fn main() {
             (@arg list: -l "Lists test values")
             (@arg test_req: -r requires[list] "Tests requirement for listing")
             (@arg aaaa: --aaaa +takes_value {
-                    |a| if a.contains("a") {
+                    |a| if a.contains('a') {
                         Ok(())
                     } else {
                         Err(String::from("string does not contain at least one a"))
@@ -70,7 +70,7 @@ fn main() {
 
     // You can check for the existence of subcommands, and if found use their
     // matches just as you would the top level app
-    if let Some(ref matches) = matches.subcommand_matches("test") {
+    if let Some(matches) = matches.subcommand_matches("test") {
         // "$ myapp test" was run
         if matches.is_present("list") {
             // "$ myapp test -l" was run

examples/21_aliases.rs

@@ -23,7 +23,7 @@ fn main() {
     }
 
     // You can get the independent subcommand matches (which function exactly like App matches)
-    if let Some(ref matches) = matches.subcommand_matches("add") {
+    if let Some(matches) = matches.subcommand_matches("add") {
         // Safe to use unwrap() because of the required() option
         println!("Adding file: {}", matches.value_of("input").unwrap());
     }