[PATCH] Add shortcuts for "nexti" and "stepi" commands in Single-Key mode

[Ruslan Kabatsayev <b7.10110111@gmail.com>]

Currently, "layout asm" is not so useful as "layout src" with Single-Key mode:
you have to use multi-key commands like "ni" and "si" to do single-stepping.
This patch adds, in addition to "next" and "step" commands, corresponding
assembly-level ones - "nexti" and "stepi" - to Single-Key mode, with the
shortcuts of "N" and "S" respectively.

gdb/ChangeLog:

	* tui/tui.c: Add "nexti" and "stepi" to the tui_commands list
	* doc/gdb.texinfo: Document the new shortcuts in Single-Key mode
---
 gdb/doc/gdb.texinfo |    8 ++++++++
 gdb/tui/tui.c       |    2 ++
 2 files changed, 10 insertions(+)

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index c167a86..56163ab 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -25415,6 +25415,10 @@ finish
 @item n
 next
 
+@kindex N @r{(SingleKey TUI key)}
+@item N
+nexti
+
 @kindex q @r{(SingleKey TUI key)}
 @item q
 exit the SingleKey mode.
@@ -25427,6 +25431,10 @@ run
 @item s
 step
 
+@kindex S @r{(SingleKey TUI key)}
+@item S
+stepi
+
 @kindex u @r{(SingleKey TUI key)}
 @item u
 up
diff --git a/gdb/tui/tui.c b/gdb/tui/tui.c
index c918f3e..dbd86e8 100644
--- a/gdb/tui/tui.c
+++ b/gdb/tui/tui.c
@@ -75,8 +75,10 @@ static const struct tui_char_command tui_commands[] = {
   { 'd', "down" },
   { 'f', "finish" },
   { 'n', "next" },
+  { 'N', "nexti" },
   { 'r', "run" },
   { 's', "step" },
+  { 'S', "stepi" },
   { 'u', "up" },
   { 'v', "info locals" },
   { 'w', "where" },
-- 
1.7.10.2