spelling: recursion

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

ruby/ql/lib/codeql/ruby/regexp/internal/ParseRegExp.qll

@@ -241,7 +241,7 @@ abstract class RegExp extends Ast::StringlikeLiteral {
 
   /**
    * Helper predicate for `escapingChar`.
-   * In order to avoid negative recusrion, we return a boolean.
+   * In order to avoid negative recursion, we return a boolean.
    * This way, we can refer to `escaping(pos - 1).booleanNot()`
    * rather than to a negated version of `escaping(pos)`.
    */