mirror of
https://github.com/junegunn/vim-easy-align.git
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266 lines
7.9 KiB
Markdown
266 lines
7.9 KiB
Markdown
vim-easy-align
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==============
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A simple, easy-to-use Vim alignment plugin without too much ambition.
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Demo
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----
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Features
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--------
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- Optimized for code editing
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- Designed to require minimal keystrokes
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- Extensible alignment rules
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- Aligns text around either _all or n-th_ occurrence(s) of the delimiter
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- Ignores delimiters in certain syntax highlight groups (e.g. comments, strings)
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- Ignores lines without a matching delimiter
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Installation
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------------
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Either [download zip file](http://www.vim.org/scripts/script.php?script_id=4520)
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and extract in ~/.vim or use [Vundle](https://github.com/gmarik/vundle) (recommended)
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or [Pathogen](https://github.com/tpope/vim-pathogen).
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### With Vundle
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```vim
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Bundle 'junegunn/vim-easy-align'
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```
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Usage
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-----
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_vim-easy-align_ defines interactive `:EasyAlign` command in the visual mode.
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For convenience, it is advised that you define a mapping for triggering it in
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your `.vimrc`.
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```vim
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vnoremap <silent> <Enter> :EasyAlign<cr>
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```
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With the mapping, you can align selected lines with a few keystrokes.
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1. `<Enter>` key to start interactive EasyAlign command
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1. Optional Enter keys to toggle right-justification mode
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1. Optional field number (default: 1)
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- `1` Around the 1st occurrences of delimiters
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- `2` Around the 2nd occurrences of delimiters
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- ...
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- `*` Around all occurrences of delimiters
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- `**` Left-right alternating alignment around all delimiters
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- `-` Around the last occurrences of delimiters (`-1`)
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- `-2` Around the second to last occurrences of delimiters
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- ...
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1. Delimiter key (a single keystroke; `<space>`, `=`, `:`, `.`, `|`, `,`)
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Alignment rules for the following delimiters have been defined to meet the most needs.
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| Delimiter key | Description/Use cases |
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| ------------- | ---------------------------------------------------------- |
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| `<space>` | General alignment around spaces |
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| `=` | Operators containing equals sign (=, ==, !=, +=, &&=, ...) |
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| `:` | Suitable for formatting JSON or YAML |
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| `.` | Multi-line method chaining |
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| `,` | Multi-line method arguments |
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| | | Table markdown |
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### Example command sequences
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| With visual map | Description | Equivalent command |
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| ------------------- | -------------------------------------------------------- | ------------------------- |
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| `<Enter><space>` | Alignment around 1st whitespaces | `:'<,'>EasyAlign\ ` |
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| `<Enter>2<space>` | Alignment around 2nd whitespaces | `:'<,'>EasyAlign2\ ` |
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| `<Enter>-<space>` | Alignment around the last whitespaces | `:'<,'>EasyAlign-\ ` |
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| `<Enter>:` | Alignment around 1st colon | `:'<,'>EasyAlign:` |
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| `<Enter>=` | Alignment around 1st equals signs (and the likes) | `:'<,'>EasyAlign=` |
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| `<Enter>2=` | Alignment around 2nd equals signs (and the likes) | `:'<,'>EasyAlign2=` |
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| `<Enter>3=` | Alignment around 3rd equals signs (and the likes) | `:'<,'>EasyAlign3=` |
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| `<Enter>*=` | Alignment around all equals signs (and the likes) | `:'<,'>EasyAlign*=` |
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| `<Enter>**=` | Left-right alternating alignment around all equals signs | `:'<,'>EasyAlign**=` |
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| `<Enter><Enter>=` | Right-justified alignment around 1st equals signs | `:'<,'>EasyAlignRight=` |
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| `<Enter><Enter>**=` | Right-left alternating alignment around all equals signs | `:'<,'>EasyAlignRight**=` |
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| ... | ... | |
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### Partial alignment in blockwise-visual mode
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In blockwise-visual mode (`CTRL-V`), EasyAlign command aligns only the selected
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text in the block, instead of the whole lines in the range.
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Consider the following case where you want to align text around `=>` operators.
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```ruby
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my_hash = { :a => 1,
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:aa => 2,
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:aaa => 3 }
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```
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In non-blockwise visual mode (`v` / `V`), `<Enter>=` won't work since the
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assignment operator in the first line gets in the way. So we instead enter
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blockwise-visual mode (`CTRL-V`), and select the text *around*
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`=>` operators, then press `<Enter>=`.
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```ruby
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my_hash = { :a => 1,
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:aa => 2,
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:aaa => 3 }
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```
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However, in this case, we don't really need blockwise visual mode
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since the same can be easily done using the negative field number: `<Enter>-=`
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Options
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-------
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| Option | Type | Default | Description |
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| ----------------------------- | ---------- | --------------------- | -------------------------------------------------- |
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| g:easy_align_ignores | list | ['String', 'Comment'] | Ignore delimiters in these syntax highlight groups |
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| g:easy_align_ignore_unmatched | boolean | `1` | Ignore lines without matching delimiter |
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| g:easy_align_delimiters | dictionary | `{}` | Extend or override alignment rules |
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### Ignoring delimiters in comments or strings
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EasyAlign can be configured to ignore delimiters in certain syntax highlight
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groups, such as code comments or strings. By default, delimiters that are
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highlighted as code comments or strings are ignored.
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```vim
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" Default:
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" If a delimiter is in a highlight group whose name matches
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" any of the followings, it will be ignored.
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let g:easy_align_ignores = ['Comment', 'String']
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```
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For example, the following paragraph
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```ruby
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{
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# Quantity of apples: 1
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apple: 1,
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# Quantity of bananas: 2
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bananas: 2,
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# Quantity of grape:fruits: 3
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'grape:fruits': 3
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}
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```
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becomes as follows on `<Enter>:`:
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```ruby
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{
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# Quantity of apples: 1
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apple: 1,
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# Quantity of bananas: 2
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bananas: 2,
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# Quantity of grape:fruits: 3
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'grape:fruits': 3
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}
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```
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Naturally, this feature only works when syntax highlighting is enabled.
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You can change the default rule by defining `g:easy_align_ignores` array.
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```vim
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" Ignore nothing!
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let g:easy_align_ignores = []
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```
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Then you get,
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```ruby
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{
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# Quantity of apples: 1
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apple: 1,
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# Quantity of bananas: 2
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bananas: 2,
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# Quantity of grape: fruits: 3
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'grape: fruits': 3
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}
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```
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Satisfied? :satisfied:
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### Ignoring unmatched lines
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Lines without any matching delimiter are ignored as well (except in
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right-justification mode).
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For example, when aligning the following code block around the colons,
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```ruby
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{
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apple: proc {
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this_line_does_not_have_a_colon
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},
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bananas: 2,
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grapefruits: 3
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}
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```
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this is usually what we want.
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```ruby
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{
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apple: proc {
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this_line_does_not_have_a_colon
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},
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bananas: 2,
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grapefruits: 3
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}
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```
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However, this default behavior is also configurable.
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```vim
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let g:easy_align_ignore_unmatched = 0
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```
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Then we get,
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```ruby
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{
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apple: proc {
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this_line_does_not_have_a_colon
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},
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bananas: 2,
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grapefruits: 3
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}
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```
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### Extending alignment rules
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```vim
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" Examples
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let g:easy_align_delimiters = {
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\ '>': { 'pattern': '>>\|=>\|>' },
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\ '/': { 'pattern': '//\+\|/\*\|\*/' },
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\ '#': { 'pattern': '#\+' },
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\ ']': {
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\ 'pattern': '[\[\]]',
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\ 'margin_left': '',
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\ 'margin_right': '',
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\ 'stick_to_left': 0
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\ },
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\ ')': {
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\ 'pattern': '[()]',
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\ 'margin_left': '',
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\ 'margin_right': '',
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\ 'stick_to_left': 0
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\ }
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\ }
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```
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Author
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------
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[Junegunn Choi](https://github.com/junegunn)
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License
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-------
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MIT
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