Document AnalyzeAngledIncludes, update info about standard library in…

…cludes (#100)

config.md

@@ -211,7 +211,7 @@ Describes the style of the codebase, beyond formatting.
 ### FullyQualifiedNamespaces
 
 Namespaces that should always be fully qualified, meaning no "using"
-declarations, always spell out the whole name (with or without leading::). 
+declarations, always spell out the whole name (with or without leading::).
 All nested namespaces are affected as well.
 Affects availability of the AddUsing tweak.
 
@@ -314,6 +314,12 @@ Diagnostics:
 A list of regexes. Include Cleaner will not produce diagnostics for headers
 whose path is a suffix match for any of these.
 
+#### AnalyzeAngledIncludes
+{:.v19}
+
+A boolean that enables/disables detection of unused angled includes that are not from the Standard Library.
+Disabled by default to avoid false-positives caused by umbrella headers.
+
 ### MissingIncludes
 {:.v17}
 

design/include-cleaner.md

@@ -149,14 +149,16 @@ recommended to users. The users should always write `#include
 using `// IWYU pragma: private, include "public.h"` in your `private.h` header
 that is being exported.
 
-### Standard library
+### Standard library (before clangd-17)
 
 By default, Include Cleaner will not diagnose headers from the Standard
 Library. Standard Library headers support is not complete yet (due to the
 macros and the fact that a symbol is allowed to come from multiple headers) but
 you can enable this unstable feature through passing `--include-cleaner-stdlib`
 flag to clangd invocation.
 
+Since clangd-17, Standard Library headers are always diagnosed and the flag is ignored.
+
 ### Inserting Includes
 
 The complete version of Include Cleaner will not only warn about unused

styles.css

@@ -168,7 +168,8 @@ a[href^="https://code.woboq.org/"] {
 }
 
 /* Version marker ornaments */
-.v6::before, .v7::before, .v8::before, .v9::before, .v10::before, .v11::before, .v12::before, .v13::before, .v14::before, .v15::before, .v16::before, .v17::before, .v18::before {
+.v6::before, .v7::before, .v8::before, .v9::before, .v10::before, .v11::before, .v12::before,
+.v13::before, .v14::before, .v15::before, .v16::before, .v17::before, .v18::before, .v19::before {
   color: #008;
   border-radius: 3px;
   padding: 0.2em 0.6em;
@@ -193,6 +194,7 @@ a[href^="https://code.woboq.org/"] {
 .v16::before { content: "clangd-16"; }
 .v17::before { content: "clangd-17"; }
 .v18::before { content: "clangd-18"; }
+.v19::before { content: "clangd-19"; }
 #edit {
   text-decoration: none;
   position: absolute;