Expand Javadoc for generated deprecated Lexer.unread method

To fix downstream Javadoc warnings about missing param/throws info.

src/main/java/org/sablecc/sablecc/lexer/Lexer.java

@@ -597,6 +597,8 @@ public class Lexer
      * @deprecated This method doesn't restore line/column info correctly in some cases
      *     (if a token begins in the middle of a CRLF newline pair).
      *     There is no planned replacement.
+     * @param token the token to push back onto the input
+     * @throws IOException when thrown by {@link PushbackReader#unread(int)}
      */
     @Deprecated
     protected void unread(Token token) throws IOException

src/main/resources/org/sablecc/sablecc/lexer.txt

@@ -296,6 +296,8 @@ Macro:LexerBody
      * @deprecated This method doesn't restore line/column info correctly in some cases
      *     (if a token begins in the middle of a CRLF newline pair).
      *     There is no planned replacement.
+     * @param token the token to push back onto the input
+     * @throws IOException when thrown by {@link PushbackReader#unread(int)}
      */
     @Deprecated
     protected void unread(Token token) throws IOException