treewide: Convert most fmt::format -> std::format

Change-Id: I3c9ac1eed1c86c6cd9f7fd3a1ba356734e79f937
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/src/netlink.cpp b/src/netlink.cpp
index 69ea5c6..eccf039 100644
--- a/src/netlink.cpp
+++ b/src/netlink.cpp
@@ -1,6 +1,5 @@
 #include "netlink.hpp"
 
-#include <fmt/format.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 
@@ -9,6 +8,7 @@
 #include <stdplus/raw.hpp>
 
 #include <array>
+#include <format>
 #include <stdexcept>
 #include <system_error>
 
@@ -30,13 +30,13 @@
     if (hdr.nlmsg_len < sizeof(hdr))
     {
         throw std::runtime_error(
-            fmt::format("nlmsg length shorter than header: {} < {}",
+            std::format("nlmsg length shorter than header: {} < {}",
                         hdr.nlmsg_len, sizeof(hdr)));
     }
     if (msgs.size() < hdr.nlmsg_len)
     {
         throw std::runtime_error(
-            fmt::format("not enough message for nlmsg: {} < {}", msgs.size(),
+            std::format("not enough message for nlmsg: {} < {}", msgs.size(),
                         hdr.nlmsg_len));
     }
     auto msg = msgs.substr(NLMSG_HDRLEN, hdr.nlmsg_len - NLMSG_HDRLEN);
@@ -185,13 +185,13 @@
     const auto& hdr = stdplus::raw::refFrom<rtattr, Aligned>(data);
     if (hdr.rta_len < RTA_LENGTH(0))
     {
-        throw std::runtime_error(fmt::format(
+        throw std::runtime_error(std::format(
             "rtattr shorter than header: {} < {}", hdr.rta_len, RTA_LENGTH(0)));
     }
     if (data.size() < hdr.rta_len)
     {
         throw std::runtime_error(
-            fmt::format("not enough message for rtattr: {} < {}", data.size(),
+            std::format("not enough message for rtattr: {} < {}", data.size(),
                         hdr.rta_len));
     }
     auto attr = data.substr(RTA_LENGTH(0), hdr.rta_len - RTA_LENGTH(0));