Add -h testing

cli/tests/help.rs

@@ -22,3 +22,25 @@ fn help() {
 		String::from_utf8(output.stdout).unwrap()
 	);
 }
+
+#[test]
+fn help_short() {
+	let long = Command::cargo_bin("watchexec")
+		.unwrap()
+		.arg("--help")
+		.output()
+		.unwrap();
+
+	let short = Command::cargo_bin("watchexec")
+		.unwrap()
+		.arg("--help")
+		.output()
+		.unwrap();
+
+	assert!(short.status.success(), "-h returns 0");
+	assert_eq!(short.stderr, Vec::<u8>::new(), "-h stderr is empty");
+	assert_eq!(
+		long.stdout, short.stdout,
+		"--help and -h output are the same"
+	);
+}

cli/tests/snapshots/help__help_unix.snap

@@ -17,7 +17,7 @@ FLAGS:
         --no-global-ignore     Skip auto-loading of global or environment-wide ignore files
         --no-meta              Ignore metadata changes
         --no-process-group     Do not use a process group when running the command
-        --no-ignore            Skip auto-loading of project ignore files (.gitignore, .ignore, etc.)
+        --no-ignore            Skip auto-loading of project ignore files (.gitignore, .ignore, etc)
     -n, --no-shell             Do not wrap command in a shell. Deprecated: use --shell=none instead.
         --no-vcs-ignore        Skip auto-loading of VCS (Git, etc) ignore files
     -N, --notify               Send a desktop notification when the command ends

cli/tests/snapshots/help__help_windows.snap

@@ -17,7 +17,7 @@ FLAGS:
         --no-global-ignore     Skip auto-loading of global or environment-wide ignore files
         --no-meta              Ignore metadata changes
         --no-process-group     Do not use a process group when running the command
-        --no-ignore            Skip auto-loading of project ignore files (.gitignore, .ignore, etc.)
+        --no-ignore            Skip auto-loading of project ignore files (.gitignore, .ignore, etc)
     -n, --no-shell             Do not wrap command in a shell. Deprecated: use --shell=none instead.
         --no-vcs-ignore        Skip auto-loading of VCS (Git, etc) ignore files
     -N, --notify               Send a desktop notification when the command ends