Update CHANGELOG.

and format.

CHANGELOG.md

@@ -2,6 +2,7 @@
 All notable changes to this project will be documented in this file.
 
 ## Unreleased - ???
+- Add `os/strftime` for date formatting.
 - Fix `ev/select` on threaded channels sometimes live-locking.
 - Support the `NO_COLOR` environment variable to turn off VT100 color codes in repl (and in scripts).
   See http://no-color.org/

src/core/os.c

@@ -1354,8 +1354,7 @@ JANET_CORE_FN(os_cryptorand,
 /* Helper function to get given or current time as local or UTC struct tm.
  * - arg n+0: optional time_t to be converted, uses current time if not given
  * - arg n+1: optional truthy to indicate the convnersion uses local time */
-static struct tm *time_to_tm(const Janet *argv, int32_t argc, int32_t n, struct tm *t_infos)
-{
+static struct tm *time_to_tm(const Janet *argv, int32_t argc, int32_t n, struct tm *t_infos) {
     time_t t;
     if (argc > n && !janet_checktype(argv[n], JANET_NIL)) {
         int64_t integer = janet_getinteger64(argv, n);
@@ -1364,7 +1363,7 @@ static struct tm *time_to_tm(const Janet *argv, int32_t argc, int32_t n, struct
         time(&t);
     }
     struct tm *t_info = NULL;
-    if (argc > n+1 && janet_truthy(argv[n+1])) {
+    if (argc > n + 1 && janet_truthy(argv[n + 1])) {
         /* local time */
 #ifdef JANET_WINDOWS
         _tzset();
@@ -1433,7 +1432,7 @@ JANET_CORE_FN(os_strftime,
     const char *p = fmt;
     while (*p) {
         if (*p++ == '%') {
-            if(!strchr(valid, *p)) {
+            if (!strchr(valid, *p)) {
                 janet_panicf("invalid conversion specifier '%%%c'", *p);
             }
             p++;