Improve the "next" shortcut.

* src/gdbmtool.c (open_handler): Close the previously
opened database.
(close_handler): Free the file name.
(print_dir_handler): Print the number of buckets.
(command_repeat_type): New enum.
(command) <repeat>: Change type to enum command_repeat_type.
(command_tab): Update accordingly. Mark "next" with REPEAT_NOARG.
(run_last_command): Handle REPEAT_NOARG separately.
* NEWS: Document the shortcut.
* doc/gdbm.texi: Likewise.
* src/debug.c (datbuf_format): Don't represent
bytes after the end of datum as zeros.
(gdbm_debug_datum): Print datum size.

1 files changed, 8 insertions, 3 deletions

diff --git a/doc/gdbm.texi b/doc/gdbm.texi
index 7f93046..4eb8793 100644
--- a/doc/gdbm.texi
+++ b/doc/gdbm.texi
@@ -1923,8 +1923,8 @@ existing @acronym{GDBM} database or to create a new one.
 @flindex junk.gdbm
 When invoked without arguments, it tries to open a database file called
 @file{junk.gdbm}, located in the current working directory.  You can
-change this default by supplying the name of the database to use as
-an argument to the program, e.g.:
+change this default by supplying the name of the database as
+argument to the program, e.g.:
 
 @example
 $ gdbmtool file.db
@@ -2007,7 +2007,7 @@ command line options.
 
 After successful startup, @command{gdbmtool} starts a loop, in which
 it reads commands from the standard input, executes them and prints
-the results on the standard output.  If the standard input is attached
+results on the standard output.  If the standard input is attached
 to a console, @command{gdbmtool} runs in interactive mode, which is
 indicated by its @dfn{prompt}:
 
@@ -2384,6 +2384,11 @@ List the contents of the database.
 Sequential access: fetch and display the next record.  If the @var{key} is
 given, the record following the one with this key will be fetched.
 
+Issuing several @code{next} commands in row is rather common.  A
+shortcut is provided to facilitate such use: if the last entered
+command was @command{next}, hitting the @kbd{Enter} key repeats it
+without arguments.
+
 See also @code{first}, above.
 
 @xref{Sequential}, for more information on sequential access.