Revert "Merge pull request #27 from anusii/zy/26_multiline_comment"

This reverts commit b1c6a8b, reversing
changes made to de9df94.

lib/src/graph.dart

@@ -568,11 +568,8 @@ class Graph {
   ///
   /// Updates [Graph.ctx], [Graph.groups] and [Graph.triples] in the process.
   void parseTurtle(String fileContent) {
-    String processedContent = _preprocessTurtleContent(fileContent);
-    final String content = _removeComments(processedContent);
-
+    final String content = _removeComments(fileContent);
     List parsedList = parser.parse(content).value;
-
     for (List tripleList in parsedList) {
       _saveToContext(tripleList);
     }
@@ -925,29 +922,4 @@ class Graph {
     }
     return rtnStr;
   }
-
-  /// Preprocesses Turtle content to handle multiline string literals.
-  ///
-  /// This function addresses the issue of multiline literals in Turtle syntax,
-  /// which are enclosed within triple quotes `"""`.
-  String _preprocessTurtleContent(String turtleContent) {
-    // Regular expression to match multiline literals.
-
-    final multilineLiteralRegex = RegExp(r'"""(.*?)"""', dotAll: true);
-
-    // Replace each multiline literal with a processed version.
-
-    return turtleContent.replaceAllMapped(multilineLiteralRegex, (match) {
-      // Get the multiline literal, excluding the triple quotes.
-
-      String multilineLiteral = match.group(1)!;
-
-      // Process the multiline literal as needed.
-      // Example: Replace line breaks with a special sequence.
-      String processedLiteral = multilineLiteral.replaceAll('\n', '\\n');
-
-      // Return the processed literal with the original triple quotes
-      return '"$processedLiteral"';
-    });
-  }
 }