commit message formatting

[Ben Pfaff]

Hi Friedrich.  Thanks for all the work you've been doing on PSPP lately.

I noticed that the commit messages you're putting into the repository
are single very long lines, like this:

    fixed initial show of names in header window. Variable names only showed up 
after switching between variable and data window. The reason is that the 
buttons of the columns are not created. This is due to interdependency between 
the size allocation and the button creation. I removed the need_button 
mechanism.

The canonical way to format Git commit messages is with a brief,
single-line summary paragraph, followed by one or more paragraphs with
additional explanation, wrapped at about 75 or so columns.  You can find
lots of examples of those in the repository, but here's one way that I
might format the above according to the usual fashion:

    gui: Fix initial show of names in header window.

    The Variable names only showed up after switching between variable and
    data window. The reason is that the buttons of the columns are not
    created. This is due to interdependency between the size allocation and
    the button creation. I removed the need_button mechanism.