[fusl] clang-format fusl

fusl/src/unistd/dup2.c

 #include <unistd.h>
 #include <errno.h>
 #include <fcntl.h>
 #include "syscall.h"
 
-int dup2(int old, int new)
-{
-        int r;
+int dup2(int old, int new) {
+  int r;
 #ifdef SYS_dup2
-        while ((r=__syscall(SYS_dup2, old, new))==-EBUSY);
+  while ((r = __syscall(SYS_dup2, old, new)) == -EBUSY)
+    ;
 #else
-        if (old==new) {
-                r = __syscall(SYS_fcntl, old, F_GETFD);
-                if (r >= 0) return old;
-        } else {
-                while ((r=__syscall(SYS_dup3, old, new, 0))==-EBUSY);
-        }
+  if (old == new) {
+    r = __syscall(SYS_fcntl, old, F_GETFD);
+    if (r >= 0)
+      return old;
+  } else {
+    while ((r = __syscall(SYS_dup3, old, new, 0)) == -EBUSY)
+      ;
+  }
 #endif
-        return __syscall_ret(r);
+  return __syscall_ret(r);
 }