Fix macros.quote custom op symbol interpolation. (#17256)

Provides a workaround/fix for #7589.
https://github.com/nim-lang/Nim/issues/7589

Updated docs and tutorial to reflect change.

Updated runnableExamples to include an example.

Co-authored-by: name <name@example.com>

compiler/semexprs.nim

@@ -2021,18 +2021,28 @@ proc processQuotations(c: PContext; n: var PNode, op: string,
     n = newIdentNode(getIdent(c.cache, $quotes.len), n.info)
     ids.add n
     return
-
+  
+  template handlePrefixOp(prefixed) =
+    if prefixed[0].kind == nkIdent:
+      let examinedOp = prefixed[0].ident.s
+      if examinedOp == op:
+        returnQuote prefixed[1]
+      elif examinedOp.startsWith(op):
+        prefixed[0] = newIdentNode(getIdent(c.cache, examinedOp.substr(op.len)), prefixed.info)
 
   if n.kind == nkPrefix:
     checkSonsLen(n, 2, c.config)
-    if n[0].kind == nkIdent:
-      var examinedOp = n[0].ident.s
-      if examinedOp == op:
-        returnQuote n[1]
-      elif examinedOp.startsWith(op):
-        n[0] = newIdentNode(getIdent(c.cache, examinedOp.substr(op.len)), n.info)
-  elif n.kind == nkAccQuoted and op == "``":
-    returnQuote n[0]
+    handlePrefixOp(n)
+  elif n.kind == nkAccQuoted:
+    if op == "``":
+      returnQuote n[0]
+    else: # [bug #7589](https://github.com/nim-lang/Nim/issues/7589)
+      if n.len == 2 and n[0].ident.s == op:
+        var tempNode = nkPrefix.newTree()
+        tempNode.newSons(2)
+        tempNode[0] = n[0]
+        tempNode[1] = n[1]
+        handlePrefixOp(tempNode)
   elif n.kind == nkIdent:
     if n.ident.s == "result":
       n = ids[0]