Document new config options in clangd 20 (#122)

Author: HighCommander4

config.md

@@ -215,6 +215,26 @@ declarations, always spell out the whole name (with or without leading::).
 All nested namespaces are affected as well.
 Affects availability of the AddUsing tweak.
 
+### QuotedHeaders
+{:.v20}
+
+A list of regexes. Headers whose path matches one of these regexes are
+inserted using `""` syntax.
+
+### AngledHeaders
+{:.v20}
+
+A list of regexes. Headers whose path matches one of these regexes are
+inserted using `<>` syntax.
+
+Example:
+
+```
+Style:
+  QuotedHeaders: "src/.*"
+  AngledHeaders: ["path/sdk/.*", "third-party/.*"]
+```
+
 ## Diagnostics
 {:.v12}
 
@@ -327,12 +347,30 @@ Enables Include Cleaner's [missing includes diagnostics](/design/include-cleaner
 Possible values: `None` (default), `Strict`.
 
 ## Completion
-{:.v13}
 
 ### AllScopes
+{:.v13}
 Whether code completion should include suggestions from scopes that are
 not visible. The required scope prefix will be inserted.
 
+### ArgumentLists
+{:.v20}
+
+Determines what is inserted in argument list position when completing a
+call to a function. Here are the valid values and examples of the
+corresponding behaviour, assuming a function `foo(int arg)` exists
+(`^` represents the cursor position):
+
+- `None`: `fo^` completes to `foo`
+- `OpenDelimeter`: `fo^` completes to `foo(^`
+- `Delimeters`: `fo^` completes to `foo(^)`
+- `FullPlaceholders`: `fo^` completes to `foo(int arg)`, with `int arg` selected
+
+The default is `FullPlaceholders`.
+
+This option governs the completion of template names as well, where
+the delimiters are `<>`.
+
 ## InlayHints
 {:.v14}
 
@@ -345,6 +383,7 @@ InlayHints:
   Enabled: Yes
   ParameterNames: Yes
   DeducedTypes: Yes
+  DefaultArguments: No
   TypeNameLimit: 24
 ```
 
@@ -382,6 +421,21 @@ void foo() {
 } // foo
 ```
 
+### DefaultArguments
+{:.v20}
+
+A boolean that enables/disables inlay hints for default arguments. Example:
+
+```c++
+void foo(int a, int b = 42);
+void bar() {
+  // This line will be displayed as `foo(a: 41, b: 42);`
+  // The `a:` is the usual parameter hint.
+  // The `, b: 42` is a default argument hint.
+  foo(41);
+}
+```
+
 ### TypeNameLimit
 {:.v17}
 

styles.css

@@ -169,7 +169,8 @@ 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, .v19::before {
+.v13::before, .v14::before, .v15::before, .v16::before, .v17::before, .v18::before, .v19::before,
+.v20::before {
   color: #008;
   border-radius: 3px;
   padding: 0.2em 0.6em;
@@ -195,6 +196,7 @@ a[href^="https://code.woboq.org/"] {
 .v17::before { content: "clangd-17"; }
 .v18::before { content: "clangd-18"; }
 .v19::before { content: "clangd-19"; }
+.v20::before { content: "clangd-20"; }
 #edit {
   text-decoration: none;
   position: absolute;