Trivial changes: whitespace and modes.

Remote whitespace at the ends of lines.
Remove blank lines from the ends of files.
Change modes on source files so that they
are not executable.

Signed-off-by: Dan Cross <cross@gajendra.net>

src/cmd/samterm/icons.c

@@ -22,13 +22,13 @@ Cursor bullseye={
 };
 Cursor deadmouse={
 	{-7, -7},
-	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	 0x00, 0x00, 0x00, 0x0C, 0x00, 0x8E, 0x1D, 0xC7,
-	 0xFF, 0xE3, 0xFF, 0xF3, 0xFF, 0xFF, 0x7F, 0xFE, 
+	 0xFF, 0xE3, 0xFF, 0xF3, 0xFF, 0xFF, 0x7F, 0xFE,
 	 0x3F, 0xF8, 0x17, 0xF0, 0x03, 0xE0, 0x00, 0x00,},
-	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, 0x82,
-	 0x04, 0x41, 0xFF, 0xE1, 0x5F, 0xF1, 0x3F, 0xFE, 
+	 0x04, 0x41, 0xFF, 0xE1, 0x5F, 0xF1, 0x3F, 0xFE,
 	 0x17, 0xF0, 0x03, 0xE0, 0x00, 0x00, 0x00, 0x00,}
 };
 Cursor lockarrow={

src/cmd/samterm/io.c

@@ -170,7 +170,7 @@ again:
 		goto again;
 	}
 	got |= 1<<type;
-	return got; 
+	return got;
 }
 
 int

src/cmd/samterm/main.c

@@ -464,7 +464,7 @@ flushtyping(int clearesc)
 	ulong n;
 
 	if(clearesc)
-		typeesc = -1;	
+		typeesc = -1;
 	if(typestart == typeend) {
 		modified = 0;
 		return;
@@ -514,7 +514,7 @@ nontypingkey(int c)
 	case SCROLLKEY:
 	case CUT:
 	case COPY:
-	case PASTE:    
+	case PASTE:
 		return 1;
 	}
 	return 0;

src/cmd/samterm/mesg.c

@@ -472,7 +472,7 @@ void
 outcopy(int count, uchar *data)
 {
 	while(count--)
-		outdata[HSIZE+outcount++] = *data++;	
+		outdata[HSIZE+outcount++] = *data++;
 }
 
 void

src/cmd/samterm/samterm.h

@@ -181,4 +181,3 @@ void	outshort(int);
 void	outlong(long);
 void	outvlong(vlong);
 void	outsend(void);
-