diff --git a/TODO b/TODO
index 0a60914..ea8920c 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,5 @@
+word space/offset before the first letter
+
 don't dump image when there is nothing
 
 Integrate splash/cairo
@@ -9,14 +11,11 @@ draw non-orthogonal lines with CSS
 position history stack (popstate)
 
 ==Wait until someone asks==
-
 try harder finding glyph names (using fontforge) for CID Type 0
 rename single-html -> embed-font/image/css ...
-
 merge sub/sup into one line
 precise link dest: zoom
 
-
 ==Future==
 argument auto-completion
 use absolute positioning for long whitespace
diff --git a/src/HTMLRenderer/draw.cc b/src/HTMLRenderer/draw.cc
index adbbfe4..e745fe4 100644
--- a/src/HTMLRenderer/draw.cc
+++ b/src/HTMLRenderer/draw.cc
@@ -101,6 +101,7 @@ static void get_shading_bbox(GfxState * state, GfxShading * shading,
 
 /*
  * Note that the coordinate system in HTML and PDF are different
+ * This functions returns the angle of vector (dx,dy) in the PDF coordinate system, in rad
  */
 static double get_angle(double dx, double dy)
 {