Remove whitespace from the end of lines

drivers/lcd/pcf8574_lcd_backpack.c

@@ -567,24 +567,24 @@ static void lcd_init(FAR struct pcf8574_lcd_dev_s *priv)
   latch_nybble(priv, 0x20>>4, false);
 
   /* Function set: DL=0;Interface is 4 bits, N=1 (2 Lines), F=0 (5x8 dots font) */
-  
+
   lcd_putcmd(priv, 0x28);
 
   /* Display Off: D=0 (Display off), C=0 (Cursor Off), B=0 (Blinking Off) */
-  
+
   lcd_putcmd(priv, 0x08);
 
   /* Display Clear */
-  
+
   lcd_putcmd(priv, CMD_CLEAR);
   up_udelay(DELAY_US_HOMECLEAR);  /* clear needs extra time */
 
   /* Entry Mode Set: I/D=1 (Increment), S=0 (No shift) */
-  
+
   lcd_putcmd(priv, 0x06);
 
   /* Display On, Cursor Off */
-  
+
   lcd_putcmd(priv, 0x0C);
 }
 
@@ -610,7 +610,7 @@ static void lcd_create_char(FAR struct pcf8574_lcd_dev_s *priv,
 {
   int nIdx;
   uint8_t addr;
-  
+
   (void)lcd_read_busy_addr(priv, &addr);
   lcd_putcmd(priv, CMD_SET_CGADDR | (idxchar << 3));  /* set CGRAM address */
 
@@ -737,7 +737,7 @@ static void lcd_codec_action(FAR struct pcf8574_lcd_dev_s *priv,
         {
           if (count <= 0) /* silly case */
             break;
-            
+
           else
             {
               uint8_t row;
@@ -817,12 +817,12 @@ static void lcd_codec_action(FAR struct pcf8574_lcd_dev_s *priv,
             {
               end = priv->cfg.cols;
             }
-          
+
           for (nIdx = col; nIdx < end; ++nIdx)
             {
               lcd_putdata(priv, ' ');
             }
-          
+
           lcd_set_curpos(priv, row, col);
           }
         break;
@@ -841,12 +841,12 @@ static void lcd_codec_action(FAR struct pcf8574_lcd_dev_s *priv,
           uint8_t nIdx;
 
           lcd_get_curpos(priv, &row, &col);
-          
+
           for (nIdx = col; nIdx < priv->cfg.cols; ++nIdx)
             {
               lcd_putdata(priv, ' ');
             }
-          
+
           lcd_set_curpos(priv, row, col);
         }
         break;
@@ -932,7 +932,7 @@ static void lcd_codec_action(FAR struct pcf8574_lcd_dev_s *priv,
           lcd_set_curpos(priv, row, 0);
         }
         break;
-        
+
       case SLCDCODE_END:             /* Cursor end */
         {
           uint8_t row;
@@ -1356,7 +1356,7 @@ int pcf8574_lcd_backpack_register(FAR const char *devpath,
 {
   FAR struct pcf8574_lcd_dev_s *priv;
   int ret;
-  
+
   /* Sanity check on geometry */
 
   if (cfg->rows < 1 || cfg->rows > 4)

drivers/lcd/pcf8574_lcd_backpack_readme.txt

@@ -91,7 +91,7 @@ E.g.:
 
     #include <nuttx/i2c/i2c_master.h>
     #include "pcf8574_lcd_backpack.h"
-    
+
     #define MJKDZ_I2C_PORTNO 1
     #define MJKDZ_DEVICE_NAME "/dev/lcd0"
 
@@ -242,4 +242,4 @@ Troubleshooting
   range of voltages at this pin is very narrow, and outside that
   range there will be nothing visible on the display, so most of the
   turn range of the pot is non-useful.  Much of human life has been
-  wasted in the rediscovery of this farcically idiotic 
+  wasted in the rediscovery of this farcically idiotic