[TASK] TS Parser: Update a visitor variable name

A misleading variable name is updated to make
the method more clear and easier to read.

Resolves: #100181
Related: #97816
Releases: main
Change-Id: I12b646196cbb80d521eb8bb3a1bd175ef3d9bbdc
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78136


Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Simon Schaufelberger <simonschaufi+typo3@gmail.com>
Reviewed-by: Simon Schaufelberger <simonschaufi+typo3@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: core-ci <typo3@b13.com>

typo3/sysext/core/Classes/TypoScript/IncludeTree/Visitor/IncludeTreeAstBuilderVisitor.php

@@ -82,11 +82,11 @@ final class IncludeTreeAstBuilderVisitor implements IncludeTreeVisitorInterface
      */
     public function visit(IncludeInterface $include, int $currentDepth): void
     {
-        $tokenStream = $include->getLineStream();
-        if ($tokenStream && !$include->isSplit()) {
+        $lineStream = $include->getLineStream();
+        if ($lineStream && !$include->isSplit()) {
             // A "split" include means that the entire TypoScript is split into child includes. The
             // TokenStream of the split include itself must not be parsed, so it's excluded here.
-            $this->ast = $this->astBuilder->build($tokenStream, $this->ast, $this->flatConstants);
+            $this->ast = $this->astBuilder->build($lineStream, $this->ast, $this->flatConstants);
         }
     }
 }