Fix unparsing of the command line to avoid superfluous spaces.

scheme/cmdline.scm

@@ -372,7 +372,9 @@
 
 ;; unparser
 
-(define (unparse-string/s-expr completion pos v)
+(define (unparse-string/s-expr completion pos v start-of-line?)
+  (if (not start-of-line?)
+      (display " "))
   (cond
    ((and completion (to-complete? v))
     (completion v)
@@ -389,21 +391,19 @@
     (error "Don't know how to unparse this." v))))
 
 (define (unparse-redirection completion pos rd)
+  (display " ")
   (display (symbol->string (redirection-op rd)))
-  (display " ")
   (unparse-string/s-expr completion pos
-			 (redirection-dest rd)))
+			 (redirection-dest rd) #f))
 
-(define (unparse-command completion pos cmd)
-  (unparse-string/s-expr completion pos (command-executable cmd))
-  (display " ")
+(define (unparse-command completion pos cmd start-of-line?)
+  (unparse-string/s-expr completion pos (command-executable cmd) start-of-line?)
   (for-each (lambda (arg)
-	      (unparse-string/s-expr completion pos arg)
-	      (display " "))
+	      (unparse-string/s-expr completion pos arg #f))
 	    (command-args cmd))
   (for-each (lambda (arg)
-	      (unparse-redirection completion pos arg)
-	      (display " "))
+	      (display " ")
+	      (unparse-redirection completion pos arg))
 	    (command-redirections cmd)))
 
 (define (unparse-command-line cmdln . arg)
@@ -414,13 +414,12 @@
 	   (track-port (make-tracking-output-port string-port)))
       (with-current-output-port track-port
 	(unparse-command completion pos
-			 (command-line-first-cmd cmdln))
-	(display " ")
+			 (command-line-first-cmd cmdln) #t)
 	(for-each 
 	 (lambda (comb.cmd)
-	   (display (symbol->string (car comb.cmd)))
-	   (display " ")
-	   (unparse-command completion pos (cdr comb.cmd)))
+           (display " ")
+           (display (symbol->string (car comb.cmd)))
+	   (unparse-command completion pos (cdr comb.cmd) #f))
 	 (command-line-combinator/cmds cmdln))
 	(cond
 	 ((command-line-job-ctrl cmdln)