[review] update doc_hint tests

Author: tommilligan

src/config/mod.rs

@@ -498,6 +498,11 @@ mod test {
         assert_eq!(config.was_set().verbose(), false);
     }
 
+    const PRINT_DOCS_STABLE_OPTION: &str = "stable_option <boolean> Default: false";
+    const PRINT_DOCS_UNSTABLE_OPTION: &str = "unstable_option <boolean> Default: false (unstable)";
+    const PRINT_DOCS_PARTIALLY_UNSTABLE_OPTION: &str =
+        "partially_unstable_option [V1|V2|V3 (unstable)] Default: V1";
+
     #[test]
     fn test_print_docs_exclude_unstable() {
         use self::mock::Config;
@@ -506,10 +511,9 @@ mod test {
         Config::print_docs(&mut output, false);
 
         let s = str::from_utf8(&output).unwrap();
-
-        assert_eq!(s.contains("stable_option"), true);
-        assert_eq!(s.contains("unstable_option"), false);
-        assert_eq!(s.contains("(unstable)"), false);
+        assert_eq!(s.contains(PRINT_DOCS_STABLE_OPTION), true);
+        assert_eq!(s.contains(PRINT_DOCS_UNSTABLE_OPTION), false);
+        assert_eq!(s.contains(PRINT_DOCS_PARTIALLY_UNSTABLE_OPTION), true);
     }
 
     #[test]
@@ -520,9 +524,9 @@ mod test {
         Config::print_docs(&mut output, true);
 
         let s = str::from_utf8(&output).unwrap();
-        assert_eq!(s.contains("stable_option"), true);
-        assert_eq!(s.contains("unstable_option"), true);
-        assert_eq!(s.contains("(unstable)"), true);
+        assert_eq!(s.contains(PRINT_DOCS_STABLE_OPTION), true);
+        assert_eq!(s.contains(PRINT_DOCS_UNSTABLE_OPTION), true);
+        assert_eq!(s.contains(PRINT_DOCS_PARTIALLY_UNSTABLE_OPTION), true);
     }
 
     #[test]