patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/os_win32.c b/src/os_win32.c
index 2f9ecdc..972f10d 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -7113,13 +7113,12 @@
 /*
  * SUB STREAM (aka info stream) handling:
  *
- * NTFS can have sub streams for each file.  Normal contents of file is
- * stored in the main stream, and extra contents (author information and
- * title and so on) can be stored in sub stream.  After Windows 2000, user
- * can access and store those informations in sub streams via explorer's
- * property menuitem in right click menu.  Those informations in sub streams
- * were lost when copying only the main stream.  So we have to copy sub
- * streams.
+ * NTFS can have sub streams for each file.  The normal contents of a file is
+ * stored in the main stream, and extra contents (author information, title and
+ * so on) can be stored in a sub stream.  After Windows 2000, the user can
+ * access and store this information in sub streams via an explorer's property
+ * menu item in the right click menu.  This information in sub streams was lost
+ * when copying only the main stream.  Therefore we have to copy sub streams.
  *
  * Incomplete explanation:
  *	http://msdn.microsoft.com/library/en-us/dnw2k/html/ntfs5.asp