Add explanation of helper ref '../' test

[first-timers[bot]]

🆕🐥☝ First Timers Only.

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• [x] 🙋 Claim this issue: Comment below.

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• [x] 📝 Update the file src/compile.js in the squirrelly repository (press the little pen Icon) and edit the line as shown below.

@@ -125,7 +125,7 @@ function Compile (str) {
     function helperRef (name, id, filters) {
       var prefix
       if (typeof id !== 'undefined') {
-        if (/(?:\.\.\/)+/g.test(id)) {
+        if (/(?:\.\.\/)+/g.test(id)) { // Test if the helper reference is prefixed with ../
           prefix = helperArray[helperNumber - (id.length / 3) - 1].id
         } else {
           prefix = id.slice(0, -1)

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• [x] 🏁 Done Ask in comments for a review :)

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This issue was created by First-Timers-Bot.

[nebrelbug]

Reserved for @Artistic18 if they want

[Artistic18]

Yes i will take it.Thanks