- More code cleanup and codestyle updates

- Fixed some possible nullref exceptions
- Methods signatures now have up to 3 parameters before breakaing down each parameter in a separate line
- Method invocations have the same rule, except the first parameter will be in the same line as the invocation to prevent some ugliness when passing lambas as arguments
- Applied many more codestyles
- Extensions folder fully reformatted

src/NadekoBot/Common/Yml/CommentAttribute.cs

@@ -5,7 +5,5 @@ public class CommentAttribute : Attribute
     public string Comment { get; }
 
     public CommentAttribute(string comment)
-    {
-        Comment = comment;
-    }
+        => Comment = comment;
 }

src/NadekoBot/Common/Yml/CommentGatheringTypeInspector.cs

@@ -9,16 +9,12 @@ public class CommentGatheringTypeInspector : TypeInspectorSkeleton
     private readonly ITypeInspector innerTypeDescriptor;
 
     public CommentGatheringTypeInspector(ITypeInspector innerTypeDescriptor)
-    {
-        this.innerTypeDescriptor = innerTypeDescriptor ?? throw new ArgumentNullException("innerTypeDescriptor");
-    }
+        => this.innerTypeDescriptor = innerTypeDescriptor ?? throw new ArgumentNullException("innerTypeDescriptor");
 
     public override IEnumerable<IPropertyDescriptor> GetProperties(Type type, object container)
-    {
-        return innerTypeDescriptor
+        => innerTypeDescriptor
             .GetProperties(type, container)
             .Select(d => new CommentsPropertyDescriptor(d));
-    }
 
     private sealed class CommentsPropertyDescriptor : IPropertyDescriptor
     {
@@ -32,31 +28,29 @@ public class CommentGatheringTypeInspector : TypeInspectorSkeleton
 
         public string Name { get; set; }
 
-        public Type Type { get { return baseDescriptor.Type; } }
+        public Type Type
+            => baseDescriptor.Type;
 
         public Type TypeOverride {
-            get { return baseDescriptor.TypeOverride; }
-            set { baseDescriptor.TypeOverride = value; }
+            get => baseDescriptor.TypeOverride;
+            set => baseDescriptor.TypeOverride = value;
         }
 
         public int Order { get; set; }
 
         public ScalarStyle ScalarStyle {
-            get { return baseDescriptor.ScalarStyle; }
-            set { baseDescriptor.ScalarStyle = value; }
+            get => baseDescriptor.ScalarStyle;
+            set => baseDescriptor.ScalarStyle = value;
         }
 
-        public bool CanWrite { get { return baseDescriptor.CanWrite; } }
+        public bool CanWrite
+            => baseDescriptor.CanWrite;
 
         public void Write(object target, object value)
-        {
-            baseDescriptor.Write(target, value);
-        }
+            => baseDescriptor.Write(target, value);
 
         public T GetCustomAttribute<T>() where T : Attribute
-        {
-            return baseDescriptor.GetCustomAttribute<T>();
-        }
+            => baseDescriptor.GetCustomAttribute<T>();
 
         public IObjectDescriptor Read(object target)
         {

src/NadekoBot/Common/Yml/CommentsObjectDescriptor.cs

@@ -15,8 +15,15 @@ public sealed class CommentsObjectDescriptor : IObjectDescriptor
 
     public string Comment { get; private set; }
 
-    public object Value { get { return innerDescriptor.Value; } }
-    public Type Type { get { return innerDescriptor.Type; } }
-    public Type StaticType { get { return innerDescriptor.StaticType; } }
-    public ScalarStyle ScalarStyle { get { return innerDescriptor.ScalarStyle; } }
+    public object Value
+        => innerDescriptor.Value;
+
+    public Type Type
+        => innerDescriptor.Type;
+
+    public Type StaticType
+        => innerDescriptor.StaticType;
+
+    public ScalarStyle ScalarStyle
+        => innerDescriptor.ScalarStyle;
 }

src/NadekoBot/Common/Yml/Rgba32Converter.cs

@@ -9,9 +9,7 @@ namespace NadekoBot.Common.Yml;
 public class Rgba32Converter : IYamlTypeConverter
 {
     public bool Accepts(Type type)
-    {
-        return type == typeof(Rgba32);
-    }
+        => type == typeof(Rgba32);
 
     public object ReadYaml(IParser parser, Type type)
     {
@@ -31,9 +29,7 @@ public class Rgba32Converter : IYamlTypeConverter
 public class CultureInfoConverter : IYamlTypeConverter
 {
     public bool Accepts(Type type)
-    {
-        return type == typeof(CultureInfo);
-    }
+        => type == typeof(CultureInfo);
 
     public object ReadYaml(IParser parser, Type type)
     {

src/NadekoBot/Common/Yml/UriConverter.cs

@@ -7,9 +7,7 @@ namespace NadekoBot.Common.Yml;
 public class UriConverter : IYamlTypeConverter
 {
     public bool Accepts(Type type)
-    {
-        return type == typeof(Uri);
-    }
+        => type == typeof(Uri);
 
     public object ReadYaml(IParser parser, Type type)
     {

src/NadekoBot/Common/Yml/YamlHelper.cs

@@ -26,7 +26,7 @@ public class YamlHelper
 
         // Check the value and write the character.
 
-        if (character is >= 0xD800 and <= 0xDFFF || character > 0x10FFFF)
+        if (character is >= 0xD800 and <= 0xDFFF or > 0x10FFFF)
         {
             return point;
         }
@@ -35,13 +35,8 @@ public class YamlHelper
     }
         
     public static bool IsHex(char c)
-    {
-        return
-            c is >= '0' and <= '9' ||
-            c is >= 'A' and <= 'F' ||
-            c is >= 'a' and <= 'f';
-    }
-        
+        => c is >= '0' and <= '9' or >= 'A' and <= 'F' or >= 'a' and <= 'f';
+
     public static int AsHex(char c)
     {
         if (c <= '9')