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articles/vi.md: update

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@ -30,7 +30,7 @@ in doubt of something by using the `:help <topic>` command or `<F1>` to access t
Some of these can be prefixed with a register name and a count number (in that order).
Commands that work with registers use by default an anonymous registers if none is explicitly specified.
`c`: command mode, `i` = insert mode; `v`: visual mode; `n`: normal mode.
`c`: command mode, `i` = insert mode; `v`: visual mode; `n`: normal mode; `t`: terminal mode.
### Basics
- `:e`: open file in a new buffer, file needn't exist
@ -113,9 +113,15 @@ It has to be noted that `Home`, `End`, `PageUp/Down` and cursor keys also work.
- `fe`: move to `e`
- (n) `F`: move to specified character, backwards
### Searching
### Search & Replace
- (n) `/`: search for pattern, forwards
- (n) `?`: search for pattern, backwards
- (n) `s`: replace (substitute) matches
The `%` expands to the current file name of the current buffer. It is required if you want
to apply `s` to the entire file, because it defaults to the current line only (therefore the `g` flag actually is global
to the current line and not the file). This by the way, is legacy from earlier line-based **ed**itors.
- `%s/pattertosearch/replacement/g`: replace all instances of `pattertosearch` by `replacement` in the file
- `%s/foo/bar/gc`: prompt for each possible replacement
### Other
- (n) `~`: change case of current character under the cursor
@ -126,9 +132,13 @@ It has to be noted that `Home`, `End`, `PageUp/Down` and cursor keys also work.
- (n) `K`: look for the identifier under the cursor in the man pages, really useful when you're doing C programming.
- (n) `.`: repeat last action
- `:help`, `:h`: Vim help pages
- `:!`: execute shell command (in the shell specified by the `shell` varible)
- `:!`: execute shell command (in the shell specified by the `shell` variable)
- `:r!`: execute shell command and paste the stdout of that command in the current buffer at where the cursor is
- `:w !`: (not `:w!`) send buffer or current range to the specified shell command
- `:term`: opens a terminal window, enters to a special `terminal` mode, similar to insert mode.
- (t) `Ctrl-\ Ctrl-n`: escape from terminal (Escape gets sent literally to the terminal process), also you may want to remap this
- `:mkses`: saves current session (optionally takes a filename where to save the session; `Session.vim` by default)
- `:so`: Source VimScript file, also used to restore from a session file.
### Macros
- (n) `q`: start recording macro to register
@ -183,7 +193,8 @@ It has to be noted that `Home`, `End`, `PageUp/Down` and cursor keys also work.
## vi-like editors
- Vim: vi improved, one of the most popular vi-like editors; includes a scripting language,
VimScript for extending the editor.
- Neovim: a fork of Vim, adds [Lua](lua.md) as a replacement for VimScript, improves performance.
- Neovim: a fork of Vim, adds [Lua](lua.md) as a replacement for VimScript, improves performance, cleans cruft from
Vim's codebase (has less LOC than Vim).
- nvi: reimplementation of the original Berkley vi, is the default `vi` editor in the [BSDs](bsd.md).
- vis: minimalistic vi-like editor, adds structured regular expressions inspired by the [Sam](sam.md) and
[Acme](acme.md) editors, includes Lua for scripting.