Fix tests

After enabling tests in CI, I realized they weren't passing (due to #2). This fixes a
regression introduced in #2 and updates the tests to the intended changes from #2.

Author: iwahbe

main.go

@@ -68,7 +68,8 @@ func (p prog) run() (string, error) {
 
 	switch p.output {
 	case "env":
-		return fmt.Sprintf(`SHARD_TESTS="%s"\nSHARD_PATHS="%s"`, pattern, strings.Join(paths, " ")), nil
+		return fmt.Sprintf(`SHARD_TESTS="%s"
+SHARD_PATHS="%s"`, pattern, strings.Join(paths, " ")), nil
 	default:
 		return fmt.Sprintf(`-run "%s"  %s`, pattern, strings.Join(paths, " ")), nil
 	}

main_test.go

@@ -15,13 +15,13 @@ func TestProg(t *testing.T) {
 		{
 			name: "default output",
 			p:    prog{total: 1, root: "."},
-			want: `-run ^(?:TestAssign|TestCollect|TestProg)\$  ./. ./internal`,
+			want: `-run "^(?:TestAssign|TestCollect|TestProg)\$"  ./. ./internal`,
 		},
 		{
 			name: "env output",
 			p:    prog{output: "env", total: 1, root: "."},
-			want: `SHARD_TESTS=^(?:TestAssign|TestCollect|TestProg)\$
-SHARD_PATHS=./. ./internal`,
+			want: `SHARD_TESTS="^(?:TestAssign|TestCollect|TestProg)\$"
+SHARD_PATHS="./. ./internal"`,
 		},
 	}