Removed redundant word

jorgsowa · nikic · commit e643471854dd · 2023-10-16T21:16:28.000+02:00
diff --git a/Book/php7/internal_types/strings.rst b/Book/php7/internal_types/strings.rst
@@ -1,7 +1,7 @@
 Strings
 =======
 
-Rather than using plain a plain ``char *`` pointer, PHP uses a custom ``zend_string`` type to
+Rather than using a plain ``char *`` pointer, PHP uses a custom ``zend_string`` type to
 represent strings. This chapter discusses how to work with this structure, as well as various
 string-related utilities.
 
