Indent byline identifiers to Github's rendering engine recognizes them.

readme.rst

@@ -679,6 +679,8 @@ For example, the Linux port of the `Unity engine`_ has `issues with case-sensiti
        naming conventions look and operate like their TOPS-10-counterparts. It
        wasn’t pretty, but it did the job.
 
+       --- Robert X. Cringely, *Accidental Empires, Chapter 4 — Amateur Hour*
+
    http://www.cringely.com/2013/02/18/accidental-empires-chapter-4-amateur-hour/
 
        CP/M and ISIS in operation have some general similarities to interactive
@@ -687,6 +689,8 @@ For example, the Linux port of the `Unity engine`_ has `issues with case-sensiti
        cross-assemblers and compilers, which became Intel products; and later
        to develop his own products which ran "native" on CP/M systems.
 
+       --- Herbert R. Johnson, *CP/M and Digital Research Inc. (DRI) History*
+
    http://www.retrotechnology.com/dri/d_dri_history.html
 
        Kildall said that PL/M was ‘‘the base for CP/M,’’ even though the
@@ -707,8 +711,7 @@ For example, the Linux port of the `Unity engine`_ has `issues with case-sensiti
        author’s possession, as well as conversations with Kip Crosby, to whom I
        am grateful for posting this question over an Internet discussion forum.
 
-   --- Paul E. Ceruzzi, page 238 of "A History of Modern Computing", 2nd. ed.
-   2003, MIT Press.
+       --- Paul E. Ceruzzi, page 238 of "A History of Modern Computing", 2nd. edition published 2003 by MIT Press.
 
 .. [#kildall_RT11]