#2929 misformatting in debugger help message

[Sergey Litvinov]

After this commit
https://sourceforge.net/p/maxima/code/ci/1db75dd57df153972b36d994ae647708da6f8676

--- a/src/mdebug.lisp
+++ b/src/mdebug.lisp
@@ -405,9 +405,10 @@
       (catch *quit-tag*
    (unwind-protect
         (do () (())
-          (format-prompt *debug-io* "~&~@[(~a:~a) ~]"
-                              (unless (stringp at) "dbm")
-                              (length *quit-tags*))
+          (format-prompt *debug-io* "~a"
+                 (format nil "~&~@[(~a:~a) ~]"
+                     (unless (stringp at) "dbm")
+                     (length *quit-tags*)))
           (finish-output *debug-io*)
           (setq val
             (catch 'macsyma-quit

There is a tiny misformatting in debugger. A newline is missing before (dbm:1).

(%i1) debugmode(true) $
(%i2) 0/0 $
expt: undefined: 0 to a negative exponent.
 -- an error.  Entering the Maxima debugger.
Enter ':h' for help.
(dbm:1) :help
Break commands start with ':'. Any unique substring may be used,
eg :r :re :res all work for :resume.

Command      Description
-----------  --------------------------------------
 :break      Set a breakpoint in the specified FUNCTION at the
             specified LINE offset from the beginning of the function.

<SKIP>

 :top        Throw to top level
 :_none      Undocumented(dbm:1)

[Leo Butler]

Fixed in commit 2f3905f.

(%i1) debugmode(true)$

(%i2) 0/0 $

expt: undefined: 0 to a negative exponent.
 -- an error.  Entering the Maxima debugger.
Enter ':h' for help.

(dbm:1) :h
Break commands start with ':'. Any unique substring may be used,
eg :r :re :res all work for :resume.

Command      Description
-----------  --------------------------------------
 :break      Set a breakpoint in the specified FUNCTION at the
             specified LINE offset from the beginning of the function.
             If FUNCTION is given as a string, then it is presumed to be
             a FILE and LINE is the offset from the beginning of the file.
 :bt         Print a backtrace of the stack frames
 :continue   Continue the computation.
 :delete     Delete all breakpoints, or if arguments are supplied delete the
             specified breakpoints
 :disable    Disable the specified breakpoints, or all if none are specified
 :enable     Enable the specified breakpoints, or all if none are specified
 :frame      With an argument print the selected stack frame.
             Otherwise the current frame.
 :help       Print help on a break command or with no arguments on
             all break commands
 :info       Print information about item
 :lisp       Evaluate the lisp form following on the line
 :lisp-quiet Evaluate the lisp form without printing a prompt
 :next       Like :step, except that subroutine calls are stepped over
 :quit       Quit this level
 :resume     Continue the computation.
 :step       Step program until it reaches a new source line
 :top        Throw to top level
 :_none      Undocumented
(dbm:1) :top

(%i3)