fix fixed size array formatting in doc signature formatting (#7845)

Author: FroyaTheHen

crates/cairo-lang-doc/src/documentable_formatter.rs

@@ -668,7 +668,7 @@ fn is_the_same_root(path1: &str, path2: &str) -> bool {
 /// Formats complex types full paths. For example "Result<Error::NotFound, System::Error>" input
 /// results in "Result<NotFound, Error>" output.
 fn extract_and_format(input: &str) -> String {
-    let delimiters = [',', '<', '>', '(', ')'];
+    let delimiters = [',', '<', '>', '(', ')', '[', ']'];
     let mut output = String::new();
     let mut slice_start = 0;
     let mut in_slice = false;

crates/cairo-lang-doc/src/tests/test-data/signature.txt

@@ -74,6 +74,10 @@ fn this_function_has_a_very_long_signature(
     yet_another_linked_parameter_at_the_end: Circle,
 ) -> Circle {}
 
+fn test_fixed_size_array(param: [u32; 8]) -> [u32; 8] {
+    return param;
+}
+
 //! > Item signature #1
 
 //! > Item documentation #1
@@ -291,3 +295,10 @@ fn this_function_has_a_very_long_signature(
 //! > Item documentation #28
 
 //! > Item documentation tokens #28
+
+//! > Item signature #29
+fn test_fixed_size_array(param: [u32; 8]) -> [u32; 8]
+
+//! > Item documentation #29
+
+//! > Item documentation tokens #29