remove debugging syslog calls from buffer library, reduce draw calls for readline

module/buffer.lua

@@ -263,15 +263,17 @@ function buffer:read(...)
    local function redraw()
     io.write("\27[u")
     io.write(buffer.." ")
-    io.write("\27[u")
-    io.write(buffer:sub(1,(#buffer-pos)+1))
+    if pos < 1 then
+     io.write("\28[D")
+    else
+     io.write("\27[u")
+     io.write(buffer:sub(1,(#buffer-pos)+1))
+    end
    end
    while true do
-    syslog("top of readline loop")
     char = readBytesOrChars(1)
     if char == "\27" then
      if readBytesOrChars(1) == "[" then
-      syslog("escape code")
       local args = {""}
       repeat
        char = readBytesOrChars(1)
@@ -286,12 +288,10 @@ function buffer:read(...)
       until not char:match("[%d;]")
       if char == "C" then -- right
        if pos > 1 then
-        syslog("moving right")
         pos = pos - 1
        end
       elseif char == "D" then -- left
        if pos <= #buffer then
-        syslog("moving left")
         pos = pos + 1
        end
       end
@@ -305,7 +305,6 @@ function buffer:read(...)
      if chop then buffer = buffer .. "\n" end
      return buffer
     else
-     syslog("char: "..tostring(string.byte(char)))
      buffer = buffer:sub(1, (#buffer - pos) + 1) .. char .. buffer:sub((#buffer - pos) + 2)
     end
     redraw()