Fix two typos in comments.

sql/sql_parse.cc:
  Fix a comment.
sql/sql_select.cc:
  Fix a comment.

sql/sql_parse.cc

@@ -5377,7 +5377,7 @@ TABLE_LIST *st_select_lex::add_table_to_list(THD *thd,
   Initialize a new table list for a nested join
 
   SYNOPSIS
-    init_table_list()
+    init_nested_join()
     thd         current thread
 
   DESCRIPTION

sql/sql_select.cc

@@ -12962,7 +12962,7 @@ static void print_join(THD *thd, String *str, List<TABLE_LIST> *tables)
   {
     TABLE_LIST *curr= *tbl;
     if (curr->outer_join)
-      str->append(" left join ", 11); // MySQL converg right to left joins
+      str->append(" left join ", 11); // MySQL converts right to left joins
     else if (curr->straight)
       str->append(" straight_join ", 15);
     else