Make numerous improvements

- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands

test/libc/unicode/strnwidth_test.c

@@ -16,6 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
 #include "libc/testlib/ezbench.h"
 #include "libc/testlib/hyperion.h"
 #include "libc/testlib/testlib.h"
@@ -38,6 +39,19 @@ TEST(strwidth, hyperion) {
   ASSERT_EQ(22304, strwidth(kHyperion, 0));
 }
 
+TEST(strwidth, chinese) {
+  ASSERT_EQ(53 * 4,
+            strwidth("天地玄黄 宇宙洪荒 日月盈昃 辰宿列张 寒来暑往 秋收冬藏"
+                     "闰馀成岁 律吕调阳 云腾致雨 露结为霜 金生丽水 玉出昆冈"
+                     "剑号巨阙 珠称夜光 果珍李柰 菜重芥姜 海咸河淡 鳞潜羽翔"
+                     "龙师火帝 鸟官人皇 始制文字 乃服衣裳 推位让国 有虞陶唐",
+                     0));
+}
+
+TEST(strwidth, cjk) {
+  ASSERT_EQ(37, strwidth("거주하는 사람들 중에서 한국어를 주로 ", 0));
+}
+
 BENCH(strnwidth, bench) {
   EZBENCH2("strnwidth", donothing, EXPROPRIATE(strnwidth(kHyperion, -1, 0)));
 }