fix typo in parameter description

Author: Wikinaut

ccmain/tesseractclass.cpp

@@ -79,7 +79,7 @@ Tesseract::Tesseract()
       INT_INIT_MEMBER(tessedit_ocr_engine_mode, tesseract::OEM_DEFAULT,
                       "Which OCR engine(s) to run (Tesseract, LSTM, both)."
                       " Defaults to loading and running the most accurate"
-                      "available.",
+                      " available.",
                       this->params()),
       STRING_MEMBER(tessedit_char_blacklist, "",
                     "Blacklist of chars not to recognize", this->params()),