updated kfg to install ghostty integration correctly - fixed

kfg

@@ -190,17 +190,13 @@ function prepend_rc {
   # Add the file to the rc file as source $file
   SOURCE_CMD="$1"
   RC="$HOME_PATH/$RC_FILE"
-  case `grep -Fox "${SOURCE_CMD}" "$RC"> /dev/null; echo $?` in
-    1)
+  local out=`grep -Fox "${SOURCE_CMD}" "$RC"`
+  if [ -z "$out" ]; then
     sed -i "1i${SOURCE_CMD//$'\n'/\\n}" "$RC"
     log_add "Added \"$SOURCE_CMD\" to $RC"
-      ;;
-    0)
+  else
     log_debug "\"$SOURCE_CMD\" already in $RC"
-      ;;
-    *)
-      log_error "Error occured trying to add $SOURCE_CMD to $RC"
-  esac
+  fi
 }
 
 function download {