library: standardize 'pointer-to-thing' whitespace use

When declaring a pointer there's usually a space after
the thing-pointed-to and no space between the asterisk
and the pointer-thingy itself. So this commit enforces
such conventions where needed on old library elements.

Signed-off-by: Jim Warner <james.warner@comcast.net>

proc/wchan.c

@@ -26,7 +26,7 @@
 #include "wchan.h"  // to verify prototype
 
 
-const char * lookup_wchan (int pid) {
+const char *lookup_wchan (int pid) {
    static char buf[64];
    const char *ret = buf;
    ssize_t num;