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/libbio/bcat.c

@@ -14,7 +14,7 @@ bcat(Biobuf *b, char *name)
 			fprint(2, "writing during %s: %r\n", name);
 	}
 	if(n < 0)
-		fprint(2, "reading %s: %r\n", name);	
+		fprint(2, "reading %s: %r\n", name);
 }
 
 int

src/libbio/brdstr.c

@@ -99,7 +99,7 @@ Brdstr(Biobuf *bp, int delim, int nulldelim)
 			}
 			ip += j;
 		}
-	
+
 		/*
 		 * full buffer without finding; add to user string and continue
 		 */

src/libbio/bvprint.c

@@ -1,7 +1,7 @@
 #include "lib9.h"
 #include <bio.h>
 
-static int 
+static int
 fmtBflush(Fmt *f)
 {
 	Biobuf *bp;

src/libbio/lib9.std.h

@@ -23,4 +23,3 @@ typedef unsigned long long uvlong;
 
 #define seek(fd, offset, whence) lseek(fd, offset, whence)
 #define create(name, mode, perm) creat(name, perm)
-