Re: [PATCH 2/5] gitk: condense repetitive code around color buttons into foreach loops

> From: Johannes Sixt <j6t@kdbg.org>
> 
> The color selection elements in the Preferences dialog are set up in a
> very uniform manner. The code doing that has grown in the past by simply
> modifying a copy of a paragraph. Extract the varying parts into a list
> and then operate the repeating parts in a foreach loop. This helps a
> later change where we want to set up the UI elements in a different way.
> 
> Change the UI names "markbgsep" and "selbgsep" to drop the "sep", which
> has obviously been left over by accident when "hunksep" was copied.
> 
> Change the suffix "but" to "btn", which resonates a bit better when
> reading the code.
> 
> Signed-off-by: Johannes Sixt <j6t@kdbg.org>
> ---
>  gitk-git/gitk | 114 ++++++++++++++++++++++++--------------------------
>  1 file changed, 55 insertions(+), 59 deletions(-)
> 
> diff --git a/gitk-git/gitk b/gitk-git/gitk
> index f5eb963b86..137940defb 100755
> --- a/gitk-git/gitk
> +++ b/gitk-git/gitk
> @@ -11832,55 +11832,46 @@ proc prefspage_colors {notebook} {

> -
> -    label $page.linkfg -padx 40 -relief sunk
> -    ttk::button $page.linkfgbut -text [mc "Link"] \
> -        -command [list choosecolor linkfgcolor {} $page [mc "link"]]
> -    grid x $page.linkfgbut $page.linkfg -sticky w
> +
> +    set coloruielems [list \
> +        bg          bgcolor {} \
> +                    [mc "Background"] \
> +                    [mc "background"] \
> +        fg          fgcolor {} \
> +                    [mc "Foreground"] \
> +                    [mc "foreground"] \