skip over spaces and tabs to find a command fed to it, and find the end of the command by looking for both spaces and tabs

clients/jack_client.cpp

@@ -221,13 +221,14 @@ std::vector<std::string> stringTokenize(const std::string& str)
 
 void cliThreadProc()
 {
+    const std::string whitespace = " \t";
     while (!shouldClose) {
         std::cout << "\n> ";
 
         std::string command;
         std::getline(std::cin, command);
-        std::size_t start = command.length()? command.find_first_not_of(" "): 0;
-        std::size_t pos = command.find(" ", start);
+        std::size_t start = command.length()? command.find_first_not_of(whitespace): 0;
+        std::size_t pos = command.find_first_of(whitespace, start);
         std::string kw = command.substr(start, pos - start);
         std::string args = command.substr(pos + 1);
         std::vector<std::string> tokens = stringTokenize(args);