Rename indexAfterRemovedSpaces to leadingSpacesCount

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: parlough

pkgs/markdown/lib/src/block_syntaxes/fenced_code_block_syntax.dart

@@ -94,21 +94,21 @@ class FencedCodeBlockSyntax extends BlockSyntax {
 
   /// Removes the leading spaces (` `) from [content] up the given [upTo] count.
   static String _removeLeadingSpaces(String content, {required int upTo}) {
-    var indexAfterRemovedSpaces = 0;
+    var leadingSpacesCount = 0;
 
     // Find the index of the first non-space character
     // or the first space after the maximum removed specified by 'upTo'.
-    while (indexAfterRemovedSpaces < upTo &&
-        indexAfterRemovedSpaces < content.length) {
+    while (leadingSpacesCount < upTo &&
+        leadingSpacesCount < content.length) {
       // We can just check for space (` `) since fenced code blocks
       // consider spaces before the opening code fence as the
       // indentation that should be removed.
-      if (content.codeUnitAt(indexAfterRemovedSpaces) != $space) {
+      if (content.codeUnitAt(leadingSpacesCount) != $space) {
         break;
       }
-      indexAfterRemovedSpaces += 1;
+      leadingSpacesCount += 1;
     }
-    return content.substring(indexAfterRemovedSpaces);
+    return content.substring(leadingSpacesCount);
   }
 }