add in vim tuto

tutos/vim.txt

@@ -29,6 +29,7 @@ and change the content to whatever you want
 	**:bn** go to next buffer
 	**:bd** delete buffer
 	**:b#** switch to last edited buffer
+	**:explore / :ex<tab>** navigate through directory, rename, and plus
 **:%y+** copie toutes les lignes DANS LE CLIPBOARD
 **:set paste** copier sans les effets des tabulations
 **: up** affiche les dernieres commandes
@@ -46,6 +47,7 @@ and change the content to whatever you want
 	**:!rm oldname** or **:!rm <ctr r>#** to delete the old copy
 **:sp** split windows (**<ctr w arrow>** to navigate)
 **:vsp** split verivally
+**:on** unsplit by closing all windows except the active one
 **:sp filename** open a new or already existing filename in split mode
 **:sp %:h/filename** open new file in the same directory
 	**%** refers to the current directory
@@ -119,6 +121,7 @@ and change the content to whatever you want
 **q:** affiche les dernieres commandes
 **==** rétablit la bonne indentation pour la ligne
 **=G** rétablit la bonne indentation pour toute la page
+**''** go to last cursor position
 
 /REMPLACER/
 **:s/old/new** remplace la 1ere occurence de ancien par nouveau