add: the tips to configure the default args for grep command

content/en/usage/usage.md

@@ -349,6 +349,13 @@ to re-play the macro only in the selected region.
     M-x grep
 
 this presents the results in a two-panes window. You can edit lines in the results buffer, changes are reflected immediately on the files, and updated on the right side. You can use search and replace `M-x query-replace` in the results buffer.
+
+> To set the default args for grep command, put this in your `~/.lem/init.lisp` file.
+> ``` 
+>   (setf lem/grep:*grep-args* "-niHI")
+>   (setf lem/grep::*last-query* "git grep -niHI ")
+> ```  
+>
 
 See also: `M-x project-grep`, bound to `C-x p g`.
 

content/ja/usage/keybindings.md

@@ -140,6 +140,13 @@ You can do more and *list all Lem's existing keybindings* with `M-x documentatio
 
 this presents the results in a two-panes window. You can edit lines in the results buffer, changes are reflected immediately on the files, and updated on the right side. You can use search and replace `M-x query-replace` in the results buffer.
 
+> To set the default args for grep command, put this in your `~/.lem/init.lisp` file.
+> ``` 
+>   (setf lem/grep:*grep-args* "-niHI")
+>   (setf lem/grep::*last-query* "git grep -niHI ")
+> ```  
+>
+    
 ## multiple cursors
 
 Use `M-C` (Alt and capital c), `M-x add-cursors-to-next-line` to add a cursor to the next line.

content/zh-TW/usage/usage.md

@@ -303,6 +303,13 @@ You can do more and *list all Lem's existing keybindings* with `M-x documentatio
     M-x grep
 
 this presents the results in a two-panes window. You can edit lines in the results buffer, changes are reflected immediately on the files, and updated on the right side. You can use search and replace `M-x query-replace` in the results buffer.
+
+> To set the default args for grep command, put this in your `~/.lem/init.lisp` file.
+> ``` 
+>   (setf lem/grep:*grep-args* "-niHI")
+>   (setf lem/grep::*last-query* "git grep -niHI ")
+> ```  
+>
 
 ## multiple cursors