Fix duplicate words

Pull Request: https://github.com/freebsd/freebsd-doc/pull/666

documentation/content/en/books/developers-handbook/l10n/_index.adoc

@@ -250,7 +250,7 @@ In order to simplify this process even more, [.filename]#bsd.nls.mk# introduces
 It is not necessary to include [.filename]#bsd.nls.mk# explicitly, it is pulled in from the common Makefiles, such as [.filename]#bsd.prog.mk# or [.filename]#bsd.lib.mk#.
 
 Usually it is enough to define `NLSNAME`, which should have the catalog name mentioned as the first argument of man:catopen[3] and list the catalog files in `NLS` without their `.msg` extension.
-Here is an example, which makes it possible to to disable NLS when used with the code examples before.
+Here is an example, which makes it possible to disable NLS when used with the code examples before.
 The `WITHOUT_NLS` man:make[1] variable has to be defined in order to build the program without NLS support.
 
 [.programlisting]

documentation/content/en/books/porters-handbook/makefiles/_index.adoc

@@ -3212,7 +3212,7 @@ When `_permission_` is not present, it is considered to be a `no-_permission_`.
 ====
 Some missing permissions will prevent a port (and all ports depending on it) from being usable by package users:
 
-A port without the `auto-accept` permission will never be be built and all the ports depending on it will be ignored.
+A port without the `auto-accept` permission will never be built and all the ports depending on it will be ignored.
 
 A port without the `pkg-mirror` permission, and any ports that depend on it, will be removed after the build, thus ensuring they are not distributed.
 ====