Update javascript/ql/src/semmle/javascript/Expr.qll

Co-Authored-By: Max Schaefer <54907921+max-schaefer@users.noreply.github.com>

Author: asger-semmle

javascript/ql/src/semmle/javascript/Expr.qll

@@ -413,7 +413,7 @@ class StringLiteral extends @stringliteral, Literal {
   /**
    * Gets the value of this string literal parsed as a regular expression, if possible.
    *
-   * All string literals have an associated regular expression tree, provided it can
+   * All string literals have an associated regular expression tree, provided they can
    * be parsed without syntax errors.
    */
   RegExpTerm asRegExp() { this = result.getParent() }
@@ -2664,4 +2664,4 @@ class OptionalChainRoot extends ChainElem {
  */
 class ImportMetaExpr extends @importmetaexpr, Expr {
   override predicate isImpure() { none() }
-}
+}