talk-llama : improve quote and backtick handling (#1364)

* ISSUE-1329: replace " with ' so it doesn't try to execute code in backticks.

* Typo

* Update to keep possessives in the output

Closes the ' then puts a ' in quotes then reopens the ' to escape the ' characters.

examples/talk-llama/talk-llama.cpp

@@ -686,8 +686,8 @@ int main(int argc, char ** argv) {
                     }
                 }
 
-                text_to_speak = ::replace(text_to_speak, "\"", "");
-                int ret = system((params.speak + " " + std::to_string(voice_id) + " \"" + text_to_speak + "\"").c_str());
+                text_to_speak = ::replace(text_to_speak, "'", "'\"'\"'");
+                int ret = system((params.speak + " " + std::to_string(voice_id) + " '" + text_to_speak + "'").c_str());
                 if (ret != 0) {
                     fprintf(stderr, "%s: failed to speak\n", __func__);
                 }