Fix a bug breaking [var html ..]

Author: longshorej

examples/tests/escapes.txt

@@ -2,6 +2,7 @@
 [set t\est 1]
 [set t\]est 2]
 [set t\ 3]
+[set test2 <p>hello</p>]
 
 test 1: [var raw test]
 test 2: \[var raw test]
@@ -11,3 +12,4 @@ test 5: \\\[var raw test]
 test 6: [var raw t\est]
 test 7: [var raw t\]est]
 test 8: [var raw t\\]est]
+test 9: [var html test2]

src/main.rs

@@ -104,7 +104,7 @@ fn process_directive(
 
         Ok("".to_string())
     } else if opt_html || opt_raw || var_html || var_raw {
-        let (_, var) = directive.split_at(if opt_html { 9 } else { 8 });
+        let (_, var) = directive.split_at(if var_html || opt_html { 9 } else { 8 });
 
         match context.load_var(var) {
             Some(value) => {
@@ -484,6 +484,7 @@ test 5: \[var raw test]
 test 6: 1
 test 7: 2
 test 8: 3est]
+test 9: <p>hello</p>
 "#
             .trim()
         );