Do not treat NixOS as a Pascal-cased identifier (#15361)

changelog: [`doc_markdown`]: do not treat NixOS as a Pascal-cased
identifier

Fixes #15360

Author: Alexendoo

book/src/lint_configuration.md

@@ -555,7 +555,7 @@ default configuration of Clippy. By default, any configuration will replace the
 * `doc-valid-idents = ["ClipPy"]` would replace the default list with `["ClipPy"]`.
 * `doc-valid-idents = ["ClipPy", ".."]` would append `ClipPy` to the default list.
 
-**Default Value:** `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "MHz", "GHz", "THz", "AccessKit", "CoAP", "CoreFoundation", "CoreGraphics", "CoreText", "DevOps", "Direct2D", "Direct3D", "DirectWrite", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PostScript", "PureScript", "TypeScript", "WebAssembly", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenAL", "OpenDNS", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenTelemetry", "OpenType", "WebGL", "WebGL2", "WebGPU", "WebRTC", "WebSocket", "WebTransport", "WebP", "OpenExr", "YCbCr", "sRGB", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]`
+**Default Value:** `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "MHz", "GHz", "THz", "AccessKit", "CoAP", "CoreFoundation", "CoreGraphics", "CoreText", "DevOps", "Direct2D", "Direct3D", "DirectWrite", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PostScript", "PureScript", "TypeScript", "WebAssembly", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenAL", "OpenDNS", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenTelemetry", "OpenType", "WebGL", "WebGL2", "WebGPU", "WebRTC", "WebSocket", "WebTransport", "WebP", "OpenExr", "YCbCr", "sRGB", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD", "NixOS", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]`
 
 ---
 **Affected lints:**

clippy_config/src/conf.rs

@@ -44,7 +44,7 @@ const DEFAULT_DOC_VALID_IDENTS: &[&str] = &[
     "WebP", "OpenExr", "YCbCr", "sRGB",
     "TensorFlow",
     "TrueType",
-    "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD",
+    "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD", "NixOS",
     "TeX", "LaTeX", "BibTeX", "BibLaTeX",
     "MinGW",
     "CamelCase",

tests/ui/doc/doc-fixable.fixed

@@ -83,7 +83,7 @@ fn test_units() {
 /// WebGL WebGL2 WebGPU WebRTC WebSocket WebTransport
 /// TensorFlow
 /// TrueType
-/// iOS macOS FreeBSD NetBSD OpenBSD
+/// iOS macOS FreeBSD NetBSD OpenBSD NixOS
 /// TeX LaTeX BibTeX BibLaTeX
 /// MinGW
 /// CamelCase (see also #2395)

tests/ui/doc/doc-fixable.rs

@@ -83,7 +83,7 @@ fn test_units() {
 /// WebGL WebGL2 WebGPU WebRTC WebSocket WebTransport
 /// TensorFlow
 /// TrueType
-/// iOS macOS FreeBSD NetBSD OpenBSD
+/// iOS macOS FreeBSD NetBSD OpenBSD NixOS
 /// TeX LaTeX BibTeX BibLaTeX
 /// MinGW
 /// CamelCase (see also #2395)