docs: add missing termdebug docs from Vim runtime updates

https://github.com/vim/vim/commit/388a5d4f20b4b64341d1604aa238cab85827b892
https://github.com/vim/vim/commit/4466ad6baa22485abb1147aca3340cced4778a66
https://github.com/vim/vim/commit/6aa57295cfbe8f21c15f0671e45fd53cf990d404

Rename terminal.txt to nvim_terminal_emulator.txt in vim-patch.sh.

2 files changed, 24 insertions, 14 deletions

diff --git a/runtime/doc/nvim_terminal_emulator.txt b/runtime/doc/nvim_terminal_emulator.txt
index 49e29111c6..253053e1b8 100644
--- a/runtime/doc/nvim_terminal_emulator.txt
+++ b/runtime/doc/nvim_terminal_emulator.txt
@@ -304,7 +304,7 @@ breakpoint, or use the "Clear breakpoint" right-click menu entry.
 Inspecting variables ~
 					*termdebug-variables* *:Evaluate*
  `:Evaluate`	    evaluate the expression under the cursor
- `K`		    same
+ `K`		    same (see |termdebug_map_K| to disable)
  `:Evaluate` {expr}   evaluate {expr}
  `:'<,'>Evaluate`     evaluate the Visually selected text
 
@@ -363,6 +363,10 @@ This works slightly differently:
 						*termdebug_use_prompt*
 Prompt mode can be used with: >
 	let g:termdebug_use_prompt = 1
+<
+						*termdebug_map_K*
+The K key is normally mapped to :Evaluate. If you do not want this use: >
+	let g:termdebug_map_K = 0
 
 <
 						*termdebug_disasm_window*
@@ -387,11 +391,11 @@ communication channel.
 
 Customizing ~
 
-GDB command						 *termdebug-customizing*
-
-To change the name of the gdb command, set the "termdebugger" variable before
+GDB command						*termdebug-customizing*
+							*g:termdebugger*
+To change the name of the gdb command, set the "g:termdebugger" variable before
 invoking `:Termdebug`: >
-	let termdebugger = "mygdb"
+	let g:termdebugger = "mygdb"
 If the command needs an argument use a List: >
 	let g:termdebugger = ['rr', 'replay', '--']
 
@@ -439,16 +443,18 @@ The argument is the gdb command.
 
 Vim window width						*termdebug_wide*
 
-To change the width of the Vim window when debugging starts, and use a
-vertical split: >
-  let g:termdebug_wide = 163
-This will set &columns to 163 when `:Termdebug` is used.  The value is restored
-when quitting the debugger.
-If g:termdebug_wide is set and &columns is already larger than
-g:termdebug_wide then a vertical split will be used without changing &columns.
-Set it to 1 to get a vertical split without every changing &columns (useful
-for when the terminal can't be resized by Vim).
+To change the width of the Vim window when debugging starts and use a vertical
+split: >
+	let g:termdebug_wide = 163
+
+This will set 'columns' to 163 when `:Termdebug` is used.  The value is
+restored when quitting the debugger.
+
+If g:termdebug_wide is set and 'columns' is already a greater value, then a
+vertical split will be used without modifying 'columns'.
 
+Set g:termdebug_wide to 1 to use a vertical split without ever changing
+'columns'.  This is useful when the terminal can't be resized by Vim.
 
 
  vim:tw=78:ts=8:noet:ft=help:norl:
diff --git a/scripts/vim-patch.sh b/scripts/vim-patch.sh
index e7e8f0b274..8235949156 100755
--- a/scripts/vim-patch.sh
+++ b/scripts/vim-patch.sh
@@ -243,6 +243,10 @@ preprocess_patch() {
   LC_ALL=C sed -e 's/\( [ab]\/src\/nvim\)\/keymap\.h/\1\/keycodes.h/g' \
     "$file" > "$file".tmp && mv "$file".tmp "$file"
 
+  # Rename terminal.txt to nvim_terminal_emulator.txt
+  LC_ALL=C sed -e 's/\( [ab]\/runtime\/doc\)\/terminal\.txt/\1\/nvim_terminal_emulator.txt/g' \
+    "$file" > "$file".tmp && mv "$file".tmp "$file"
+
   # Rename test_urls.vim to check_urls.vim
   LC_ALL=C sed -e 's@\( [ab]\)/runtime/doc/test\(_urls\.vim\)@\1/scripts/check\2@g' \
     "$file" > "$file".tmp && mv "$file".tmp "$file"