feat(autocmd): add Recording autocmds

feat(eval): add reg_recorded()

This function is used the get the last recorded register.

style(Recording): rename handler to match suggestions

fix(RecordingLeave): send autocommand earlier

This makes the autocommand fire just before setting reg_recorded to
reg_recording, this way we clearly show that we are actually just before
actually quitting the recording mode.

runtime/doc/autocmd.txt

@@ -828,6 +828,14 @@ RemoteReply			When a reply from a Vim that functions as
 SearchWrapped			After making a search with |n| or |N| if the
 				search wraps around the document back to
 				the start/finish respectively.
+							*RecordingEnter*
+RecordingEnter			When a macro starts to be recorded.
+				The pattern is the current file name, and
+				|reg_recording()| is the current register that
+				is used.
+							*RecordinLeave*
+RecordingLeave			When the is the end of a macro recording.
+				The pattern is the current file name.
 							*SessionLoadPost*
 SessionLoadPost			After loading the session file created using
 				the |:mksession| command.

runtime/doc/eval.txt

@@ -2588,6 +2588,7 @@ readdir({dir} [, {expr}])	List	file names in {dir} selected by {expr}
 readfile({fname} [, {type} [, {max}]])
 				List	get list of lines from file {fname}
 reg_executing()			String	get the executing register name
+reg_recorded()			String	get the last recorded register name
 reg_recording()			String	get the recording register name
 reltime([{start} [, {end}]])	List	get time value
 reltimefloat({time})		Float	turn the time value into a Float
@@ -7825,6 +7826,11 @@ reg_executing()						*reg_executing()*
 		Returns an empty string when no register is being executed.
 		See |@|.
 
+reg_recorded()						*reg_recorded()*
+		Returns the single letter name of the last recorded register.
+		Returns an empty string string when nothing was recorded yet.
+		See |q|.
+
 reg_recording()						*reg_recording()*
 		Returns the single letter name of the register being recorded.
 		Returns an empty string string when not recording.  See |q|.

runtime/doc/intro.txt

@@ -563,8 +563,8 @@ The command CTRL-\ CTRL-G or <C-\><C-G> can be used to go to Insert mode when
 make sure Vim is in the mode indicated by 'insertmode', without knowing in
 what mode Vim currently is.
 
-				*gQ* *Q* *mode-Ex* *Ex-mode* *Ex* *EX* *E501*
-Q or gQ			Switch to Ex mode.  This is like typing ":" commands
+				*gQ* *mode-Ex* *Ex-mode* *Ex* *EX* *E501*
+gQ			Switch to Ex mode.  This is like typing ":" commands
 			one after another, except:
 			- You don't have to keep pressing ":".
 			- The screen doesn't get updated after each command.

runtime/doc/repeat.txt

@@ -147,6 +147,9 @@ q			Stops recording.
 							*@@* *E748*
 @@			Repeat the previous @{0-9a-z":*} [count] times.
 
+							*Q*
+Q			Repeat the last recorded register [count] times.
+
 							*:@*
 :[addr]@{0-9a-z".=*+}	Execute the contents of register {0-9a-z".=*+} as an Ex
 			command.  First set cursor at line [addr] (default is

runtime/doc/vim_diff.txt

@@ -218,6 +218,7 @@ Input/Mappings:
 
 Normal commands:
   |gO| shows a filetype-defined "outline" of the current buffer.
+  |Q|  replays the last recorded macro.
 
 Options:
   'cpoptions'   flags: |cpo-_|