[Buildroot] [PATCH] docs/manual: post-image.sh/post-build.sh should use '-', not '_'

[Thomas Perale]

In reply of:
> Even though it's only documentation, the form of the names of the
> post-image.sh and post-build.sh scripts should be consistent with the
> names of those scripts used in the code base, using hyphen, not
> underscore.
> 
> Signed-off-by: Robert P. J. Day <rpjday at crashcourse.ca>
> 

Applied to 2025.02.x & 2026.05.x. Thanks

> ---
> 
>   I can see the chaos that is rootfs_overlay vs rootfs-overlay. Not
> going near that.
> 
> diff --git a/docs/manual/customize-directory-structure.adoc b/docs/manual/customize-directory-structure.adoc
> index b4b5d50e1a..aab225811b 100644
> --- a/docs/manual/customize-directory-structure.adoc
> +++ b/docs/manual/customize-directory-structure.adoc
> @@ -23,8 +23,8 @@ to you.
>  |           +-- linux.config
>  |           +-- busybox.config
>  |           +-- <other configuration files>
> -|           +-- post_build.sh
> -|           +-- post_image.sh
> +|           +-- post-build.sh
> +|           +-- post-image.sh
>  |           +-- rootfs_overlay/
>  |           |   +-- etc/
>  |           |   +-- <some files>
> @@ -84,7 +84,7 @@ layers 'common' and 'fooboard' is:
>  +-- board/
>      +-- <company>/
>          +-- common/
> -        |   +-- post_build.sh
> +        |   +-- post-build.sh
>          |   +-- rootfs_overlay/
>          |   |   +-- ...
>          |   +-- patches/
> @@ -94,7 +94,7 @@ layers 'common' and 'fooboard' is:
>              +-- linux.config
>              +-- busybox.config
>              +-- <other configuration files>
> -            +-- post_build.sh
> +            +-- post-build.sh
>              +-- rootfs_overlay/
>              |   +-- ...
>              +-- patches/
> diff --git a/docs/manual/customize-quick-guide.adoc b/docs/manual/customize-quick-guide.adoc
> index 315027c590..360cbe9622 100644
> --- a/docs/manual/customize-quick-guide.adoc
> +++ b/docs/manual/customize-quick-guide.adoc
> @@ -35,9 +35,9 @@ your project can be skipped.
>     Set +BR2_ROOTFS_OVERLAY+
>     to +board/<manufacturer>/<boardname>/rootfs-overlay+.
>  . Create a post-build script
> -   +board/<manufacturer>/<boardname>/post_build.sh+. Set
> +   +board/<manufacturer>/<boardname>/post-build.sh+. Set
>     +BR2_ROOTFS_POST_BUILD_SCRIPT+ to
> -   +board/<manufacturer>/<boardname>/post_build.sh+
> +   +board/<manufacturer>/<boardname>/post-build.sh+
>  . If additional setuid permissions have to be set or device nodes have
>     to be created, create +board/<manufacturer>/<boardname>/device_table.txt+
>     and add that path to +BR2_ROOTFS_DEVICE_TABLE+.
> diff --git a/docs/manual/customize-rootfs.adoc b/docs/manual/customize-rootfs.adoc
> index 4d03d04617..b7fe5813f7 100644
> --- a/docs/manual/customize-rootfs.adoc
> +++ b/docs/manual/customize-rootfs.adoc
> @@ -52,7 +52,7 @@ Using post-build scripts, you can remove or modify any file in your
>    post-build cleanup scripts.
>  +
>  As shown in xref:customize-dir-structure[], the recommended path for
> -  this script is +board/<company>/<boardname>/post_build.sh+.
> +  this script is +board/<company>/<boardname>/post-build.sh+.
>  +
>  The post-build scripts are run with the main Buildroot tree as current
>    working directory. The path to the target filesystem is passed as the
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