vim: helpful additions

Closes #3779

pages/common/vim.md

@@ -1,20 +1,28 @@
 # vim
 
-> Vi IMproved, a programmer's text editor, provides several modes for different kinds of text manipulation.
+> Vim (Vi IMproved), a programmer's command-line text editor, provides several modes for different kinds of text manipulation.
 > Pressing `i` enters edit mode. `<Esc>` goes back to normal mode, which doesn't allow regular text insertion.
 > More information: <https://www.vim.org>.
 
 - Open a file:
 
-`vim {{file}}`
+`vim {{path/to/file}}`
 
-- Enter text editing mode (insert mode):
+- Save a file:
 
-`<Esc>i`
+`:write`
 
-- Copy ("yank") or cut ("delete") the current line (paste it with `P`):
+- Quit without saving:
 
-`<Esc>{{yy|dd}}`
+`<Esc>:quit!<Enter>`
+
+- Open a file at a specified line number:
+
+`vim +{{line_number}} {{path/to/file}}`
+
+- View help for setting (such as {{set number}}):
+
+`<Esc>:help '{{setting_name}}'`
 
 - Undo the last operation:
 
@@ -27,11 +35,3 @@
 - Perform a regex substitution in the whole file:
 
 `<Esc>:%s/{{pattern}}/{{replacement}}/g<Enter>`
-
-- Save (write) the file, and quit:
-
-`<Esc>:wq<Enter>`
-
-- Quit without saving:
-
-`<Esc>:q!<Enter>`