Fix diagnostic location for PutFullAccessorOnItsOwnLine rule and update tests

Author: ua-niekschoemaker

src/Formatting.Analyzers/CSharp/AccessorListAnalyzer.cs

@@ -59,7 +59,7 @@ private static void AnalyzeAccessorList(SyntaxNodeAnalysisContext context)
                         DiagnosticHelpers.ReportDiagnostic(
                             context,
                             DiagnosticRules.PutFullAccessorOnItsOwnLine,
-                            accessor);
+                            Location.Create(accessor.SyntaxTree, accessor.Span));
                     }
 
                     token = accessor.Body?.CloseBraceToken ?? accessor.SemicolonToken;

src/Tests/Formatting.Analyzers.Tests/RCS0025PutFullAccessorOnItsOwnLineTests.cs

@@ -20,7 +20,7 @@ class C
 {
     private string _p;
 
-    public string P { [||]get { return _p; } set { _p = value; } }
+    public string P { [|get { return _p; }|] [|set { _p = value; }|] }
 }
 ", @"
 class C
@@ -46,7 +46,7 @@ class C
 
     public string P
     {
-        get { return _p; } [||]set { _p = value; }
+        get { return _p; } [|set { _p = value; }|]
     }
 }
 ", @"
@@ -71,7 +71,7 @@ class C
 {
     private string _p;
 
-    public string P { [||]get => _p; set => _p = value; }
+    public string P { [|get => _p;|] [|set => _p = value;|] }
 }
 ", @"
 class C
@@ -97,7 +97,7 @@ class C
 
     public string P
     {
-        get => _p; [||]set => _p = value;
+        get => _p; [|set => _p = value;|]
     }
 }
 ", @"
@@ -122,7 +122,7 @@ class C
 {
     private string _p;
 
-    public string P { [||]get { return _p; } }
+    public string P { [|get { return _p; }|] }
 }
 ", @"
 class C
@@ -145,7 +145,7 @@ class C
 {
     private string _p;
 
-    public string P { [||]get => _p; }
+    public string P { [|get => _p;|] }
 }
 ", @"
 class C