asyncio_micro: Rename StreamWriter.write() to awrite().

This method has different semantics than original asyncio, so rename to avoid
confusion. Original asyncio's is not a coroutine, while ours is.

asyncio_micro/asyncio_micro.py

@@ -222,20 +222,26 @@ class StreamWriter:
     def __init__(self, s):
         self.s = s
 
-    def write(self, buf):
+    def awrite(self, buf):
+        # This method is called awrite (async write) to not proliferate
+        # incompatibility with original asyncio. Unlike original asyncio
+        # whose .write() method is both not a coroutine and guaranteed
+        # to return immediately (which means it has to buffer all the
+        # data), this method is a coroutine.
         sz = len(buf)
         while True:
             res = self.s.write(buf)
-            log.debug("StreamWriter.write(): %d", res)
-            # If we spooled everything, (just) return
+            # If we spooled everything, return immediately
             if res == sz:
+                log.debug("StreamWriter.awrite(): completed spooling %d bytes", res)
                 return
             if res is None:
                 res = 0
+            log.debug("StreamWriter.awrite(): spooled partial %d bytes", res)
             buf = buf[res:]
             sz -= res
             s = yield IOWrite(self.s)
-            log.debug("StreamWriter.write(): can write more")
+            log.debug("StreamWriter.awrite(): can write more")
 
     def close(self):
         yield IODone(IO_WRITE, self.s)

asyncio_micro/test_http_client.py

@@ -6,7 +6,7 @@ def print_http_headers(url):
     print(reader, writer)
     print("================")
     query = "GET / HTTP/1.0\r\n\r\n"
-    yield from writer.write(query.encode('latin-1'))
+    yield from writer.awrite(query.encode('latin-1'))
     while True:
         line = yield from reader.readline()
         if not line:

asyncio_micro/test_http_server.py

@@ -5,7 +5,7 @@ def serve(reader, writer):
     print(reader, writer)
     print("================")
     print((yield from reader.read()))
-    yield from writer.write("HTTP/1.0 200 OK\r\n\r\nHello.\r\n")
+    yield from writer.awrite("HTTP/1.0 200 OK\r\n\r\nHello.\r\n")
     print("After response write")
     yield from writer.close()
     print("Finished processing request")