fix invalid lua config

Signed-off-by: ye.sijun <junnplus@gmail.com>

docs/config/lua/keyassignment/ActivatePaneByIndex.md

@@ -12,8 +12,10 @@ panes, respectively:
 local wezterm = require 'wezterm';
 
 return {
+  keys = {
     {key="a", mods="ALT", action=wezterm.action{ActivatePaneByIndex=0}},
     {key="b", mods="ALT", action=wezterm.action{ActivatePaneByIndex=1}},
     {key="c", mods="ALT", action=wezterm.action{ActivatePaneByIndex=2}},
+  }
 }
 ```

docs/config/lua/keyassignment/ClearScrollback.md

@@ -12,9 +12,9 @@ return {
   keys = {
     -- Clears only the scrollback and leaves the viewport intact.
     -- This is the default behavior.
-    {key="K", mods="CTRL|SHIFT", action=wezterm.action{ClearScrollback="ScrollbackOnly"}}
+    {key="K", mods="CTRL|SHIFT", action=wezterm.action{ClearScrollback="ScrollbackOnly"}},
     -- Clears the scrollback and viewport leaving the prompt line the new first line.
-    {key="K", mods="CTRL|SHIFT", action=wezterm.action{ClearScrollback="ScrollbackAndViewport"}}
+    {key="K", mods="CTRL|SHIFT", action=wezterm.action{ClearScrollback="ScrollbackAndViewport"}},
   }
 }
 ```

docs/config/lua/keyassignment/CloseCurrentPane.md

@@ -10,8 +10,7 @@ then kills the process associated with that pane.
 ```lua
 return {
   keys = {
-    {key="w", mods="CMD",
-     action=wezterm.action{CloseCurrentPane={confirm=true}}
+    {key="w", mods="CMD", action=wezterm.action{CloseCurrentPane={confirm=true}}},
   }
 }
 ```

docs/config/lua/keyassignment/CloseCurrentTab.md

@@ -19,8 +19,7 @@ a boolean `confirm` parameter:
 ```lua
 return {
   keys = {
-    {key="w", mods="CMD",
-     action=wezterm.action{CloseCurrentTab={confirm=true}}
+    {key="w", mods="CMD", action=wezterm.action{CloseCurrentTab={confirm=true}}},
   }
 }
 ```