C#: Address co-pilot review comments.

Author: michaelnebel

csharp/extractor/Semmle.Extraction.CSharp.Util/SymbolExtensions.cs

@@ -53,11 +53,11 @@ public static string GetName(this ISymbol symbol, bool useMetadataName = false)
         });
 
         /// <summary>
-        /// The operatorname for user-defined increment and decrement operators are "op_IncrementAssignment" and
+        /// The operatorname for user-defined instance increment- and decrement operators are "op_IncrementAssignment" and
         /// "op_DecrementAssignment" respectively.
         /// Thus we need to handle this explicitly to avoid postfixing them with an "=".
         /// </summary>
-        private static bool isIncrementOrDecrement(string operatorName) => operatorName == "++" || operatorName == "--";
+        private static bool IsIncrementOrDecrement(string operatorName) => operatorName == "++" || operatorName == "--";
 
         /// <summary>
         /// Convert an operator method name in to a symbolic name.
@@ -79,7 +79,7 @@ public static bool TryGetOperatorSymbol(this ISymbol symbol, out string operator
             if (match.Success && methodToOperator.TryGetValue($"op_{match.Groups[2]}", out var rawOperatorName))
             {
                 var prefix = match.Groups[1].Success ? "checked " : "";
-                var postfix = match.Groups[3].Success && !isIncrementOrDecrement(rawOperatorName) ? "=" : "";
+                var postfix = match.Groups[3].Success && !IsIncrementOrDecrement(rawOperatorName) ? "=" : "";
                 operatorName = $"{prefix}{rawOperatorName}{postfix}";
                 return true;
             }

csharp/ql/lib/semmle/code/csharp/exprs/Call.qll

@@ -576,7 +576,7 @@ class MutatorOperatorCall extends OperatorCall {
  *
  * ```csharp
  * class A {
- *   public void operator++() { ... }
+ *   public void operator ++() { ... }
  *
  *   public static void Increment(A a) {
  *     a++;