1 changed files with 2 additions and 1 deletions
@@ -49,7 +49,8 @@ export class MarkdownConverter {
      const line = lines[i];

      // Heading
-      const headingMatch = line.match(/^(#{1,6})\s+(.+)$/);
+      // `\s+(\S.*)` keeps the separator and the text disjoint, so matching is linear.
+      const headingMatch = line.match(/^(#{1,6})\s+(\S.*)$/);
      if (headingMatch) {
        tokens.push({
          type: 'heading',