Fix rendering issues in the documentation for the os module (#6525)
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index d269d0b..2f3b31e 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1126,18 +1126,24 @@
.. versionadded:: 3.7
-.. data:: RWF_DSYNC (since Linux 4.7)
+.. data:: RWF_DSYNC
+
Provide a per-write equivalent of the O_DSYNC open(2) flag. This flag
is meaningful only for pwritev2(), and its effect applies only to the
data range written by the system call.
+ Availability: Linux (version 4.7).
+
.. versionadded:: 3.7
-.. data:: RWF_SYNC (since Linux 4.7)
+.. data:: RWF_SYNC
+
Provide a per-write equivalent of the O_SYNC open(2) flag. This flag is
meaningful only for pwritev2(), and its effect applies only to the data
range written by the system call.
+ Availability: Linux (version 4.7).
+
.. versionadded:: 3.7
@@ -1260,16 +1266,20 @@
.. versionadded:: 3.7
-.. data:: RWF_HIPRI (since Linux 4.6)
+.. data:: RWF_HIPRI
+
High priority read/write. Allows block-based filesystems to use polling
of the device, which provides lower latency, but may use additional
resources. (Currently, this feature is usable only on a file descriptor
opened using the O_DIRECT flag.)
+ Availability: Linux (version 4.6).
+
.. versionadded:: 3.7
-.. data:: RWF_NOWAIT (since Linux 4.14)
+.. data:: RWF_NOWAIT
+
Do not wait for data which is not immediately available. If this flag
is specified, the preadv2() system call will return instantly
if it would have to read data from the backing storage or wait for a lock.
@@ -1277,6 +1287,8 @@
read. If no bytes were read, it will return -1 and set errno to EAGAIN.
Currently, this flag is meaningful only for preadv2().
+ Availability: Linux (version 4.14).
+
.. versionadded:: 3.7