Further consistency edit to return (?) on failure path in all Process…

…Utils detection functions. Improve function comments in header.

Source/Urho3D/Core/ProcessUtils.cpp

@@ -419,7 +419,7 @@ String GetPlatform()
 #elif defined(__linux__)
     return "Linux";
 #else
-    return String::EMPTY;
+    return "(?)";
 #endif
 }
 
@@ -565,7 +565,7 @@ String GetLoginName()
         }
     }
 #endif
-    return "(?)"; 
+    return "(?)";
 }
 
 String GetHostName() 
@@ -580,7 +580,7 @@ String GetHostName()
     if (GetComputerName(buffer, &len))
         return buffer;
 #endif
-    return "(?)"; 
+    return "(?)";
 }
 
 // Disable Windows OS version functionality when compiling mini version for Web, see https://github.com/urho3d/Urho3D/issues/1998
@@ -702,7 +702,7 @@ String GetOSVersion()
         return version + " (Darwin kernel " + kernel_version[0] + "." + kernel_version[1] + "." + kernel_version[2] + ")"; 
     }
 #endif
-    return "(?)"; 
+    return "(?)";
 }
 
 }

Source/Urho3D/Core/ProcessUtils.h

@@ -59,7 +59,7 @@ URHO3D_API const Vector<String>& ParseArguments(int argc, char** argv);
 URHO3D_API const Vector<String>& GetArguments();
 /// Read input from the console window. Return empty if no input.
 URHO3D_API String GetConsoleInput();
-/// Return the runtime platform identifier.
+/// Return the runtime platform identifier, or (?) if not identified.
 URHO3D_API String GetPlatform();
 /// Return the number of physical CPU cores.
 URHO3D_API unsigned GetNumPhysicalCPUs();
@@ -69,12 +69,12 @@ URHO3D_API unsigned GetNumLogicalCPUs();
 URHO3D_API void SetMiniDumpDir(const String& pathName);
 /// Return minidump write location.
 URHO3D_API String GetMiniDumpDir();
-/// Return the total amount of useable memory. 
+/// Return the total amount of usable memory in bytes.
 URHO3D_API unsigned long long GetTotalMemory(); 
-/// Return the name of the currently logged in user. 
+/// Return the name of the currently logged in user, or (?) if not identified.
 URHO3D_API String GetLoginName(); 
 /// Return the name of the running machine. 
 URHO3D_API String GetHostName();
-/// Return the version of the currently running OS. 
+/// Return the version of the currently running OS, or (?) if not identified.
 URHO3D_API String GetOSVersion(); 
 }