Fix minor materials code style

Author: vyahello

README.md

@@ -318,7 +318,7 @@ print(next(c))  # 111
 
 
 def print_name(prefix):
-    print("Search for", prefix, "prefix")
+    print("Search for ", prefix, " prefix")
     while True:
         name = yield
         if prefix in name:

materials/async_.py

@@ -3,7 +3,7 @@
 
 async def count():  # single event loop
     print("One")
-    yield asyncio.sleep(1)  # when task reaches here it will sleep to 1 seconds ands says to do other job meantime
+    await asyncio.sleep(1)  # when task reaches here it will sleep for 1 second and says to do other job meantime
     print("Two")            # temporary gives control to another function
 
 

materials/decorator.py

@@ -1,5 +1,8 @@
 def coroutine(func):
-    """A decorator function that eliminates the need to call .next() when starting a coroutine."""
+    """
+    A decorator function that eliminates the need to call .next()
+    when starting a coroutine.
+    """
     def start(*args, **kwargs):
         cr = func(*args, **kwargs)
         next(cr)

materials/send_coroutines.py

@@ -1,6 +1,9 @@
+from typing import Coroutine
+
+
 def coroutine():
     while True:
-        value = yield  # allows to manipulate yielded value
+        value = yield  # allows manipulating yielded value
         print(value)
 
 
@@ -50,7 +53,7 @@ def infinite_palindromes():
 
 
 def print_name(prefix):
-    print("Search for", prefix, "prefix")
+    print("Search for ", prefix, " prefix")
     while True:
         name = yield
         if prefix in name: