This post has a very nice answer from Martin Scharrer
The OP responds saying that he added a ~ after chapter and number for a nicer layout. What does he mean?
This post has a very nice answer from Martin Scharrer
The OP responds saying that he added a ~ after chapter and number for a nicer layout. What does he mean?
Martin's answer at Fancy Chapter Headings produced the following output (zoomed):

The comment by the OP discussed taking Martin's definition of \titleformat:
\titleformat{\chapter}[display]
{\normalfont\Large\raggedleft}
{\MakeUppercase{\chaptertitlename}%
\rlap{ \resizebox{!}{1.5cm}{\thechapter} \rule{5cm}{1.5cm}}}
{10pt}{\Huge}
and adding two spaces ~, one after \chaptertitlename and the other after \thechapter as follows:
\titleformat{\chapter}[display]
{\normalfont\Large\raggedleft}
{\MakeUppercase{\chaptertitlename~}%
\rlap{ \resizebox{!}{1.5cm}{\thechapter~} \rule{5cm}{1.5cm}}}
{10pt}{\Huge}
The net effect would be to push the word "CHAPTER" one space to the left (since it is a right-aligned field), and to add a space after the chapter number (in this case "3") which effectively offsets the black bar to the right. The result is:

As in many things, preference plays a large role...unless your editor tells you otherwise ;^)
\titleformat{\chapter}[display] {\normalfont\Large\raggedleft} {\MakeUppercase{\chaptertitlename~}% \rlap{ \resizebox{!}{1.5cm}{\thechapter~} \rule{5cm}{1.5cm}}} {10pt}{\Huge}Note the two added~and what they do to the original output. The word "chapter" is shifted slightly left, and the black bar is offset further right. – Steven B. Segletes Feb 25 '14 at 16:16