Updating comments per the C++ core guidelines and removing trailing whitespace (#194)

Fixed comments that were inconsistent with the style guidelines described in C++ core guidelines and the modern C++/WinRT language projections and removed trailing whitespace.

Inserted a space after the beginning of the comment so the text wasn't touching the // on all occurrences.

Removed all occurrences of trailing whitespace

src/CalcViewModel/Common/TraceLogger.h

@@ -9,8 +9,8 @@
 
 static const int maxFunctionSize = (int)CalculationManager::Command::CommandBINEDITEND;
 
-// A trace logging provider can only be instantiated and registered once per module. 
-// This class implements a singleton model ensure that only one instance is created. 
+// A trace logging provider can only be instantiated and registered once per module.
+// This class implements a singleton model ensure that only one instance is created.
 namespace CalculatorApp
 {
     struct FuncLog
@@ -105,7 +105,7 @@ namespace CalculatorApp
 
         // Any new Log method should
             // a) decide the level of logging. This will help us in limiting recording of events only up to a certain level. See this link for guidance https://msdn.microsoft.com/en-us/library/windows/desktop/aa363742(v=vs.85).aspx
-            // We're using Verbose level for events that are called frequently and needed only for debugging or capturing perf for specific scenarios 
+            // We're using Verbose level for events that are called frequently and needed only for debugging or capturing perf for specific scenarios
             // b) should decide whether or not to log to  telemetry and pass TraceLoggingKeyword(MICROSOFT_KEYWORD_TELEMETRY) accordingly
             // c) Should accept a variable number of additional data arguments if needed
         void LogTelemetryEvent(std::wstring_view eventName, winrt::Windows::Foundation::Diagnostics::LoggingFields fields) const;