libterm: remove unnecessary to_string() calls

Author: Jorge Aparicio

src/libterm/terminfo/searcher.rs

@@ -102,10 +102,10 @@ fn test_get_dbpath_for_term() {
         let p = get_dbpath_for_term(t).expect("no terminfo entry found");
         p.as_str().unwrap().to_string()
     };
-    assert!(x("screen") == "/usr/share/terminfo/s/screen".to_string());
+    assert!(x("screen") == "/usr/share/terminfo/s/screen");
     assert!(get_dbpath_for_term("") == None);
     setenv("TERMINFO_DIRS", ":");
-    assert!(x("screen") == "/usr/share/terminfo/s/screen".to_string());
+    assert!(x("screen") == "/usr/share/terminfo/s/screen");
     unsetenv("TERMINFO_DIRS");
 }