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docs: add import to README
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Alec Thomas
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101
README.md
101
README.md
@ -8,75 +8,72 @@ highlighted HTML, ANSI-coloured text, etc.
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Chroma is based heavily on [Pygments](http://pygments.org/), and includes
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translators for Pygments lexers and styles.
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<a id="markdown-table-of-contents" name="table-of-contents"></a>
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## Table of Contents
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<!-- TOC -->
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1. [Table of Contents](#table-of-contents)
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2. [Supported languages](#supported-languages)
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3. [Try it](#try-it)
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4. [Using the library](#using-the-library)
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1. [Supported languages](#supported-languages)
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2. [Try it](#try-it)
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3. [Using the library](#using-the-library)
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1. [Quick start](#quick-start)
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2. [Identifying the language](#identifying-the-language)
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3. [Formatting the output](#formatting-the-output)
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4. [The HTML formatter](#the-html-formatter)
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5. [More detail](#more-detail)
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4. [More detail](#more-detail)
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1. [Lexers](#lexers)
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2. [Formatters](#formatters)
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3. [Styles](#styles)
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6. [Command-line interface](#command-line-interface)
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7. [Testing lexers](#testing-lexers)
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8. [What's missing compared to Pygments?](#whats-missing-compared-to-pygments)
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5. [Command-line interface](#command-line-interface)
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6. [Testing lexers](#testing-lexers)
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7. [What's missing compared to Pygments?](#whats-missing-compared-to-pygments)
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<!-- /TOC -->
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<a id="markdown-supported-languages" name="supported-languages"></a>
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## Supported languages
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| Prefix | Language |
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| :----: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
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| A | ABAP, ABNF, ActionScript, ActionScript 3, Ada, Agda, AL, Alloy, Angular2, ANTLR, ApacheConf, APL, AppleScript, ArangoDB AQL, Arduino, ArmAsm, AutoHotkey, AutoIt, Awk |
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| B | Ballerina, Bash, Bash Session, Batchfile, BibTeX, Bicep, BlitzBasic, BNF, BQN, Brainfuck |
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| C | C, C#, C++, Caddyfile, Caddyfile Directives, Cap'n Proto, Cassandra CQL, Ceylon, CFEngine3, cfstatement, ChaiScript, Chapel, Cheetah, Clojure, CMake, COBOL, CoffeeScript, Common Lisp, Coq, Crystal, CSS, Cython |
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| D | D, Dart, Dax, Desktop Entry, Diff, Django/Jinja, dns, Docker, DTD, Dylan |
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| E | EBNF, Elixir, Elm, EmacsLisp, Erlang |
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| F | Factor, Fennel, Fish, Forth, Fortran, FortranFixed, FSharp |
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| G | GAS, GDScript, Genshi, Genshi HTML, Genshi Text, Gherkin, GLSL, Gnuplot, Go, Go HTML Template, Go Text Template, GraphQL, Groff, Groovy |
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| H | Handlebars, Hare, Haskell, Haxe, HCL, Hexdump, HLB, HLSL, HolyC, HTML, HTTP, Hy |
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| I | Idris, Igor, INI, Io, ISCdhcpd |
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| J | J, Java, JavaScript, JSON, Julia, Jungle |
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| K | Kotlin |
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| L | Lighttpd configuration file, LLVM, Lua |
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| M | Makefile, Mako, markdown, Mason, Materialize SQL dialect, Mathematica, Matlab, mcfunction, Meson, Metal, MiniZinc, MLIR, Modula-2, MonkeyC, MorrowindScript, Myghty, MySQL |
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| N | NASM, Natural, Newspeak, Nginx configuration file, Nim, Nix |
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| O | Objective-C, OCaml, Octave, Odin, OnesEnterprise, OpenEdge ABL, OpenSCAD, Org Mode |
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| Prefix | Language |
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| :----: | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| A | ABAP, ABNF, ActionScript, ActionScript 3, Ada, Agda, AL, Alloy, Angular2, ANTLR, ApacheConf, APL, AppleScript, ArangoDB AQL, Arduino, ArmAsm, AutoHotkey, AutoIt, Awk |
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| B | Ballerina, Bash, Bash Session, Batchfile, BibTeX, Bicep, BlitzBasic, BNF, BQN, Brainfuck |
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| C | C, C#, C++, Caddyfile, Caddyfile Directives, Cap'n Proto, Cassandra CQL, Ceylon, CFEngine3, cfstatement, ChaiScript, Chapel, Cheetah, Clojure, CMake, COBOL, CoffeeScript, Common Lisp, Coq, Crystal, CSS, Cython |
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| D | D, Dart, Dax, Desktop Entry, Diff, Django/Jinja, dns, Docker, DTD, Dylan |
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| E | EBNF, Elixir, Elm, EmacsLisp, Erlang |
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| F | Factor, Fennel, Fish, Forth, Fortran, FortranFixed, FSharp |
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| G | GAS, GDScript, Genshi, Genshi HTML, Genshi Text, Gherkin, GLSL, Gnuplot, Go, Go HTML Template, Go Text Template, GraphQL, Groff, Groovy |
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| H | Handlebars, Hare, Haskell, Haxe, HCL, Hexdump, HLB, HLSL, HolyC, HTML, HTTP, Hy |
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| I | Idris, Igor, INI, Io, ISCdhcpd |
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| J | J, Java, JavaScript, JSON, Julia, Jungle |
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| K | Kotlin |
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| L | Lighttpd configuration file, LLVM, Lua |
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| M | Makefile, Mako, markdown, Mason, Materialize SQL dialect, Mathematica, Matlab, mcfunction, Meson, Metal, MiniZinc, MLIR, Modula-2, MonkeyC, MorrowindScript, Myghty, MySQL |
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| N | NASM, Natural, Newspeak, Nginx configuration file, Nim, Nix |
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| O | Objective-C, OCaml, Octave, Odin, OnesEnterprise, OpenEdge ABL, OpenSCAD, Org Mode |
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| P | PacmanConf, Perl, PHP, PHTML, Pig, PkgConfig, PL/pgSQL, plaintext, Plutus Core, Pony, PostgreSQL SQL dialect, PostScript, POVRay, PowerQuery, PowerShell, Prolog, PromQL, Promela, properties, Protocol Buffer, PRQL, PSL, Puppet, Python, Python 2 |
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| Q | QBasic, QML |
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| Q | QBasic, QML |
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| R | R, Racket, Ragel, Raku, react, ReasonML, reg, Rego, reStructuredText, Rexx, RPMSpec, Ruby, Rust |
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| S | SAS, Sass, Scala, Scheme, Scilab, SCSS, Sed, Sieve, Smali, Smalltalk, Smarty, Snobol, Solidity, SourcePawn, SPARQL, SQL, SquidConf, Standard ML, stas, Stylus, Svelte, Swift, SYSTEMD, systemverilog |
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| T | TableGen, Tal, TASM, Tcl, Tcsh, Termcap, Terminfo, Terraform, TeX, Thrift, TOML, TradingView, Transact-SQL, Turing, Turtle, Twig, TypeScript, TypoScript, TypoScriptCssData, TypoScriptHtmlData |
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| V | V, V shell, Vala, VB.net, verilog, VHDL, VHS, VimL, vue |
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| W | WDTE, WebGPU Shading Language, Whiley |
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| X | XML, Xorg |
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| Y | YAML, YANG |
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| Z | Z80 Assembly, Zed, Zig |
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| S | SAS, Sass, Scala, Scheme, Scilab, SCSS, Sed, Sieve, Smali, Smalltalk, Smarty, Snobol, Solidity, SourcePawn, SPARQL, SQL, SquidConf, Standard ML, stas, Stylus, Svelte, Swift, SYSTEMD, systemverilog |
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| T | TableGen, Tal, TASM, Tcl, Tcsh, Termcap, Terminfo, Terraform, TeX, Thrift, TOML, TradingView, Transact-SQL, Turing, Turtle, Twig, TypeScript, TypoScript, TypoScriptCssData, TypoScriptHtmlData |
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| V | V, V shell, Vala, VB.net, verilog, VHDL, VHS, VimL, vue |
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| W | WDTE, WebGPU Shading Language, Whiley |
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| X | XML, Xorg |
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| Y | YAML, YANG |
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| Z | Z80 Assembly, Zed, Zig |
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_I will attempt to keep this section up to date, but an authoritative list can be
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displayed with `chroma --list`._
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<a id="markdown-try-it" name="try-it"></a>
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## Try it
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Try out various languages and styles on the [Chroma Playground](https://swapoff.org/chroma/playground/).
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<a id="markdown-using-the-library" name="using-the-library"></a>
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## Using the library
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This is version 2 of Chroma, use the import path:
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```go
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import "github.com/alecthomas/chroma/v2"
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```
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Chroma, like Pygments, has the concepts of
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[lexers](https://github.com/alecthomas/chroma/tree/master/lexers),
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[formatters](https://github.com/alecthomas/chroma/tree/master/formatters) and
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@ -95,8 +92,6 @@ In all cases, if a lexer, formatter or style can not be determined, `nil` will
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be returned. In this situation you may want to default to the `Fallback`
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value in each respective package, which provides sane defaults.
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<a id="markdown-quick-start" name="quick-start"></a>
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### Quick start
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A convenience function exists that can be used to simply format some source
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@ -106,8 +101,6 @@ text, without any effort:
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err := quick.Highlight(os.Stdout, someSourceCode, "go", "html", "monokai")
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```
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<a id="markdown-identifying-the-language" name="identifying-the-language"></a>
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### Identifying the language
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To highlight code, you'll first have to identify what language the code is
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@ -147,8 +140,6 @@ token types into a single token:
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lexer = chroma.Coalesce(lexer)
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```
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<a id="markdown-formatting-the-output" name="formatting-the-output"></a>
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### Formatting the output
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Once a language is identified you will need to pick a formatter and a style (theme).
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@ -177,8 +168,6 @@ And finally, format the tokens from the iterator:
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err := formatter.Format(w, style, iterator)
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```
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<a id="markdown-the-html-formatter" name="the-html-formatter"></a>
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### The HTML formatter
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By default the `html` registered formatter generates standalone HTML with
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@ -203,12 +192,8 @@ formatter := html.New(html.WithClasses(true))
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err := formatter.WriteCSS(w, style)
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```
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<a id="markdown-more-detail" name="more-detail"></a>
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## More detail
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<a id="markdown-lexers" name="lexers"></a>
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### Lexers
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See the [Pygments documentation](http://pygments.org/docs/lexerdevelopment/)
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@ -228,8 +213,6 @@ python3 _tools/pygments2chroma_xml.py \
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See notes in [pygments-lexers.txt](https://github.com/alecthomas/chroma/blob/master/pygments-lexers.txt)
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for a list of lexers, and notes on some of the issues importing them.
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<a id="markdown-formatters" name="formatters"></a>
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### Formatters
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Chroma supports HTML output, as well as terminal output in 8 colour, 256 colour, and true-colour.
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@ -237,8 +220,6 @@ Chroma supports HTML output, as well as terminal output in 8 colour, 256 colour,
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A `noop` formatter is included that outputs the token text only, and a `tokens`
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formatter outputs raw tokens. The latter is useful for debugging lexers.
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<a id="markdown-styles" name="styles"></a>
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### Styles
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Chroma styles are defined in XML. The style entries use the
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@ -262,8 +243,6 @@ Also, token types in a style file are hierarchical. For instance, when `CommentS
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For a quick overview of the available styles and how they look, check out the [Chroma Style Gallery](https://xyproto.github.io/splash/docs/).
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<a id="markdown-command-line-interface" name="command-line-interface"></a>
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## Command-line interface
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A command-line interface to Chroma is included.
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@ -288,10 +267,6 @@ on under the hood for easy integration with [lesspipe shipping with
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Debian and derivatives](https://manpages.debian.org/lesspipe#USER_DEFINED_FILTERS);
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for that setup the `chroma` executable can be just symlinked to `~/.lessfilter`.
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<a id="markdown-whats-missing-compared-to-pygments" name="whats-missing-compared-to-pygments"></a>
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<a id="markdown-testing-lexers" name="testing-lexers"></a>
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## Testing lexers
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If you edit some lexers and want to try it, open a shell in `cmd/chromad` and run:
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