Swift: Fix typo in a comment.

Author: geoffw0

swift/ql/lib/codeql/swift/regex/internal/ParseRegex.qll

@@ -98,7 +98,7 @@ abstract class RegExp extends Expr {
     pos =
       rank[index](int p |
         (this.nonEscapedCharAt(p) = "[" or this.nonEscapedCharAt(p) = "]") and
-        // Brackets that art part of POSIX expressions should not count as
+        // Brackets that are part of POSIX expressions should not count as
         // char-set delimiters.
         not exists(int x, int y |
           this.posixStyleNamedCharacterProperty(x, y, _) and pos >= x and pos < y
@@ -121,7 +121,9 @@ abstract class RegExp extends Expr {
     )
   }
 
-  /** Whether there is a character class, between start (inclusive) and end (exclusive). */
+  /**
+   * Whether there is a character class, between start (inclusive) and end (exclusive).
+   */
   predicate charSet(int start, int end) {
     exists(int innerStart, int innerEnd |
       this.charSetStart(start, innerStart) and