doc: document update

Author: haorenW1025

README.md

@@ -158,8 +158,6 @@ let g:completion_enable_auto_hover = 0
 let g:completion_enable_auto_signature = 0
 ```
 
-
-
 ### Enable/Disable fuzzy match
 - By default fuzzy match is disable, you can enable it by
 
@@ -201,7 +199,7 @@ completion-nvim: `substring`, `fuzzy` or `exact`.
 assign priority from high to low. For example
 
 ```vim
-let g:completion_matching_strategy_list = ['exact', 'substring', fuzzy]
+let g:completion_matching_strategy_list = ['exact', 'substring', 'fuzzy']
 ```
 
 - You can also enable ignore case matching by
@@ -231,6 +229,14 @@ augroup CompleteionTriggerCharacter
     autocmd BufEnter *.c,*.cpp let g:completion_trigger_character = ['.', '::']
 augroup end
 ```
+### Trigger on delete
+
+- `completion-nvim` doesn't trigger completion on delete by default because sometimes I've found it annoying. However,
+you can enable it by
+
+```vim
+let g:completion_tigger_on_delete = 1
+```
 
 ### Timer Adjustment
 

doc/completion-nvim.txt

@@ -174,6 +174,16 @@ g:completion_trigger_character                *g:completion_trigger_character*
 
         default value: ['.']
 
+g:completion_trigger_on_delete			    *g:completion_trigger_on_delete*
+
+
+	completion-nvim doesn't trigger completion on delete by default because
+	sometimes I've found it annoying. However, you can enable it by
+>
+	let g:completion_trigger_on_delete = 1
+<
+
+
 g:completion_timer_cycle                            *g:completion_timer_cycle*
 
         completion-nvim uses a timer to control the rate of completion. Adjust