Rerun clang-format on the repo (#1217)

🚨 clang-format changes output per version!

This is with version 19.0.0. The modifications seem to be fixing the old
version’s errors - mainly involving omitted whitespace around binary ops
and inserted whitespace between goto labels and colons (if followed by a
curly brace.)

Also fixes a few mistakes made by e.g. someone (ahem) forgetting to pass
his ctl/string.h modifications through it.

We should add this to .git-blame-ignore-revs once we have its final hash
on master.

libc/mem/shuffle.internal.h

@@ -13,7 +13,7 @@
 #define shuffle(R, A, n)                      \
   do {                                        \
     autotype(A) Array = (A);                  \
-    for (size_t i = (n)-1; i >= 1; --i) {     \
+    for (size_t i = (n) - 1; i >= 1; --i) {   \
       xchg(&Array[i], &Array[R() % (i + 1)]); \
     }                                         \
   } while (0)