tests: show how final word is not always wrapped

This is clap-rs#828.

tests/help.rs

@@ -148,6 +148,19 @@ OPTIONS:
     -c, --cafe <FILE>    A coffeehouse, coffee shop, or café.
     -p, --pos <VAL>      Some vals [values: fast, slow]";
 
+static FINAL_WORD_WRAPPING: &'static str = "ctest 0.1
+
+USAGE:
+    ctest
+
+FLAGS:
+    -h, --help
+            Prints help
+            information
+    -V, --version
+            Prints
+            version information";
+
 static OLD_NEWLINE_CHARS: &'static str = "ctest 0.1
 
 USAGE:
@@ -409,6 +422,12 @@ fn issue_626_variable_panic() {
     }
 }
 
+#[test]
+fn final_word_wrapping() {
+    let app = App::new("ctest").version("0.1").set_term_width(24);
+    assert!(test::compare_output(app, "ctest --help", FINAL_WORD_WRAPPING, false));
+}
+
 #[test]
 fn old_newline_chars() {
     let app = App::new("ctest")