Minor tweaks

include/cxxopts.hpp

@@ -242,6 +242,8 @@ namespace cxxopts
 #endif
 
 namespace cxxopts
+{
+  namespace
   {
 #ifdef _WIN32
     const std::string LQUOTE("\'");
@@ -250,6 +252,7 @@ namespace cxxopts
     const std::string LQUOTE("‘");
     const std::string RQUOTE("’");
 #endif
+  }
 
   class Value : public std::enable_shared_from_this<Value>
   {
@@ -354,7 +357,9 @@ namespace cxxopts
   {
     public:
     missing_argument_exception(const std::string& option)
-	: OptionParseException(u8"Option " + LQUOTE + option + RQUOTE + u8" is missing an argument")
+    : OptionParseException(
+        u8"Option " + LQUOTE + option + RQUOTE + u8" is missing an argument"
+      )
     {
     }
   };
@@ -363,7 +368,9 @@ namespace cxxopts
   {
     public:
     option_requires_argument_exception(const std::string& option)
-	: OptionParseException(u8"Option " + LQUOTE + option + RQUOTE + u8" requires an argument")
+    : OptionParseException(
+        u8"Option " + LQUOTE + option + RQUOTE + u8" requires an argument"
+      )
     {
     }
   };
@@ -377,8 +384,10 @@ namespace cxxopts
       const std::string& arg
     )
     : OptionParseException(
-		u8"Option " + LQUOTE + option + RQUOTE + u8" does not take an argument, but argument"
+        u8"Option " + LQUOTE + option + RQUOTE +
-		+ LQUOTE + arg + RQUOTE + " given")
+        u8" does not take an argument, but argument" +
+        LQUOTE + arg + RQUOTE + " given"
+      )
     {
     }
   };
@@ -410,8 +419,7 @@ namespace cxxopts
   {
     public:
     option_required_exception(const std::string& option)
-	: OptionParseException
+    : OptionParseException(
-	(
         u8"Option " + LQUOTE + option + RQUOTE + u8" is required but not present"
       )
     {