Improve readme, explain some test part

README.md

@@ -360,9 +360,9 @@ parameters:
 ### forbidCheckedExceptionInCallable
 - Denies throwing [checked exception](https://phpstan.org/blog/bring-your-exceptions-under-control) in callables (Closures and First class callables) as those cannot be tracked as checked by PHPStan analysis, because it is unknown when the callable is about to be called
 - It allows configuration of functions/methods, where the callable is called immediately, those cases are allowed and are also added to [dynamic throw type extension](https://phpstan.org/developing-extensions/dynamic-throw-type-extensions) which causes those exceptions to be tracked properly in your codebase (!)
-  - By default, native functions like `array_map` are present (see above). So it is recommended not to overwrite the defaults here.
+  - By default, native functions like `array_map` are present. So it is recommended not to overwrite the defaults here (by `!` char).
 - It allows configuration of functions/methods, where the callable is handling all thrown exceptions and it is safe to throw anything from there; this basically makes such calls ignored by this rule
-- It ignores [implicitly thrown Throwable](https://phpstan.org/blog/bring-your-exceptions-under-control#what-does-absent-%40throws-above-a-function-mean%3F), so it most make sense with `implicitThrows: false` configuration
+- It ignores [implicitly thrown Throwable](https://phpstan.org/blog/bring-your-exceptions-under-control#what-does-absent-%40throws-above-a-function-mean%3F)
 
 ```neon
 parameters:
@@ -376,7 +376,7 @@ parameters:
                 'Symfony\Component\Console\Question::setValidator': 0 # symfony automatically converts all thrown exceptions to error output, so it is safe to throw anything here
 ```
 
-- Make sure you have enabled [checked exception](https://phpstan.org/blog/bring-your-exceptions-under-control), otherwise, this rule does nothing. We recommend using following config:
+- We recommend using following config for checked exceptions:
   - Also, [bleedingEdge](https://phpstan.org/blog/what-is-bleeding-edge) enables proper analysis of dead types in multi-catch, so we recommend enabling even that
 
 ```neon

tests/Rule/ForbidCheckedExceptionInCallableRuleTest.php

@@ -41,7 +41,7 @@ protected function getRule(): Rule
                 [],
                 [],
                 [],
-                $this->checkedExceptions,
+                $this->checkedExceptions, // everything is checked when no config is provided
             ),
             $visitorConfig['services'][0]['arguments']['immediatelyCalledCallables'], // @phpstan-ignore-line ignore mixed access
             $visitorConfig['services'][0]['arguments']['allowedCheckedExceptionCallables'], // @phpstan-ignore-line ignore mixed access