Text Handling

- Implemented nontrivial (), which detemines whether a string contains
  any non-space characters.  Used to detect strings with no content.

src/text.h

@@ -52,6 +52,7 @@ std::string upperCase (const std::string&);
 std::string ucFirst (const std::string&);
 const char* optionalBlankLine ();
 void guess (const std::string&, std::vector<std::string>&, std::string&);
+bool nontrivial (const std::string&);
 bool digitsOnly (const std::string&);
 bool noSpaces (const std::string&);
 bool noVerticalSpace (const std::string&);