makeinfo: `` --- ''

[Akim Demaille]

There seems to be some hesitation in the output of --- and `` and ''.
Was that noticed?  It changed recently, and now it went back to the
previous value:

@@ -633,12 +633,12 @@
      by Daniel Gazard.

 Double delivery is intractable
-     Students were allowed to deliver twice their project --- with a small
-     penalty --- if they failed to meet the so-called ``first delivery
-     deadline'', or if they wanted to improve their score.  But it was
+     Students were allowed to deliver twice their project -- with a small
+     penalty -- if they failed to meet the so-called "first delivery
+     deadline", or if they wanted to improve their score.  But it was
      impossible to organize, and led to too much sloppiness from some
      students.  These problems were addressed with the introduction of
-     ``uploads'' in Tiger 2005.
+     "uploads" in Tiger 2005.

 1.4.5 Tiger 2005
 ----------------
@@ -968,7 +968,7 @@
 2.2.3 Use of C++ Features
 -------------------------

- -- Rule: Hunt Leaks
+ - Rule: Hunt Leaks
      Use every possible means to release the resources you consume,
      especially memory.  Valgrind can be a nice assistant to track memory
      leaks (*note Valgrind::).  To demonstrate different memory management