Fix command alias printing in help text

Closes #405

CHANGELOG.md

@@ -6,6 +6,9 @@
 ### Added
 - `./runtests` test runner with coverage tracking by default
 
+### Fixed
+- Printing of command aliases in help text
+
 ## [1.17.0] - 2016-05-09
 ### Added
 - Pluggable flag-level help text rendering via `cli.DefaultFlagStringFunc`

help.go

@@ -26,7 +26,7 @@ AUTHOR(S):
    {{end}}{{if .VisibleCommands}}
 COMMANDS:{{range .VisibleCategories}}{{if .Name}}
    {{.Name}}:{{end}}{{range .VisibleCommands}}
-     {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{"\t"}}{{.Usage}}{{end}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
 {{end}}{{end}}{{if .VisibleFlags}}
 GLOBAL OPTIONS:
    {{range .VisibleFlags}}{{.}}
@@ -67,7 +67,7 @@ USAGE:
 
 COMMANDS:{{range .VisibleCategories}}{{if .Name}}
    {{.Name}}:{{end}}{{range .VisibleCommands}}
-     {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{"\t"}}{{.Usage}}{{end}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
 {{end}}{{if .VisibleFlags}}
 OPTIONS:
    {{range .VisibleFlags}}{{.}}

help_test.go

@@ -169,6 +169,76 @@ func Test_helpSubcommand_Action_ErrorIfNoTopic(t *testing.T) {
 	}
 }
 
+func TestShowAppHelp_CommandAliases(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name:    "frobbly",
+				Aliases: []string{"fr", "frob"},
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"foo", "--help"})
+
+	if !strings.Contains(output.String(), "frobbly, fr, frob") {
+		t.Errorf("expected output to include all command aliases; got: %q", output.String())
+	}
+}
+
+func TestShowCommandHelp_CommandAliases(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name:    "frobbly",
+				Aliases: []string{"fr", "frob", "bork"},
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"foo", "help", "fr"})
+
+	if !strings.Contains(output.String(), "frobbly") {
+		t.Errorf("expected output to include command name; got: %q", output.String())
+	}
+
+	if strings.Contains(output.String(), "bork") {
+		t.Errorf("expected output to exclude command aliases; got: %q", output.String())
+	}
+}
+
+func TestShowSubcommandHelp_CommandAliases(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name:    "frobbly",
+				Aliases: []string{"fr", "frob", "bork"},
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"foo", "help"})
+
+	if !strings.Contains(output.String(), "frobbly, fr, frob, bork") {
+		t.Errorf("expected output to include command name; got: %q", output.String())
+	}
+}
+
 func TestShowAppHelp_HiddenCommand(t *testing.T) {
 	app := &App{
 		Commands: []Command{