Added a note about run/shell exceptions due to non-zero exits (#1294)

* Add section on rendering Pod to Text

* typo head => head2

* Add note about run/shell exceptions

Author: CurtTilmes

doc/Language/ipc.pod6

@@ -38,6 +38,12 @@ all output pipes, the program will usually not terminate.
     }
     $git.out.close();
 
+If the program fails (exits with a non-zero exit code), it will throw
+an exception when the return object is sunk.  You can capture the
+L<Proc|/type/Proc> object to avoid this if needed.
+
+    my $don't-die = run '/bin/false';
+
 You can tell the C<Proc> object to capture output as a file handle by passing
 the C<:out> and C<:err> flags. You may also pass input via the C<:in> flag.