Few comment corrections

src/lv_core/lv_group.h

@@ -69,7 +69,7 @@ typedef struct _lv_group_t
     uint8_t frozen          :1;             /*1: can't focus to new object*/
     uint8_t editing         :1;             /*1: Edit mode, 0: Navigate mode*/
     uint8_t click_focus     :1;             /*1: If an object in a group is clicked by an indev then it will be focused */
-    uint8_t refocus_policy  :1;             /*1: Focus prev if focused on deletion. 0: Focus prev if focused on deletion.*/
+    uint8_t refocus_policy  :1;             /*1: Focus prev if focused on deletion. 0: Focus next if focused on deletion.*/
     uint8_t wrap            :1;             /*1: Focus next/prev can wrap at end of list. 0: Focus next/prev stops at end of list.*/
 } lv_group_t;
 

src/lv_hal/lv_hal_disp.h

@@ -73,7 +73,7 @@ typedef struct _disp_drv_t {
 #endif
     uint32_t rotated        :1;     /*1: turn the display by 90 degree.*/
 
-    /* MANDATORY: Write the internal buffer (VDB) to the display. 'lv_flush_ready()' has to be called when finished */
+    /* MANDATORY: Write the internal buffer (VDB) to the display. 'lv_disp_flush_ready()' has to be called when finished */
     void (*flush_cb)(struct _disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p);
 
     /* OPTIONAL: Extend the invalidated areas to match with the display drivers requirements

src/lv_objx/lv_roller.h

@@ -70,6 +70,7 @@ lv_obj_t * lv_roller_create(lv_obj_t * par, const lv_obj_t * copy);
  * Set the options on a roller
  * @param roller pointer to roller object
  * @param options a string with '\n' separated options. E.g. "One\nTwo\nThree"
+ * @param inf True: Loop through the options
  */
 void lv_roller_set_options(lv_obj_t * roller, const char * options, bool inf);