fix(Custom Usage Strings): fixes the usage string regression when using help templates

Author: kbknapp

src/app/help.rs

@@ -888,7 +888,7 @@ impl<'a> Help<'a> {
                                 parser.meta.about.unwrap_or("unknown about")));
                 }
                 b"usage" => {
-                    try!(write!(self.writer, "{}", usage::create_help_usage(parser, true)));
+                    try!(write!(self.writer, "{}", usage::create_usage_no_title(parser, &[])));
                 }
                 b"all-args" => {
                     try!(self.write_all_args(&parser));

tests/help.rs

@@ -686,7 +686,27 @@ fn ripgrep_usage() {
     rg [OPTIONS] --files [<path> ...]
     rg [OPTIONS] --type-list");
 
-    assert!(test::compare_output(app, "ripgrep --help", RIPGREP_USAGE, false));
+    assert!(test::compare_output(app, "rg --help", RIPGREP_USAGE, false));
+}
+
+#[test]
+fn ripgrep_usage_using_templates() {
+    let app = App::new("ripgrep")
+        .version("0.5")
+        .usage("
+    rg [OPTIONS] <pattern> [<path> ...]
+    rg [OPTIONS] [-e PATTERN | -f FILE ]... [<path> ...]
+    rg [OPTIONS] --files [<path> ...]
+    rg [OPTIONS] --type-list")
+        .template("\
+{bin} {version}
+
+USAGE:{usage}
+
+FLAGS:
+{flags}");
+
+    assert!(test::compare_output(app, "rg --help", RIPGREP_USAGE, false));
 }
 
 #[test]