Replace backquote with command substitution

Doc/library/subprocess.rst

@@ -1159,12 +1159,12 @@ In the following examples, we assume that the relevant functions have already
 been imported from the :mod:`subprocess` module.
 
 
-Replacing /bin/sh shell backquote
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Replacing :program:`/bin/sh` shell command substitution
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .. code-block:: bash
 
-   output=`mycmd myarg`
+   output=$(mycmd myarg)
 
 becomes::
 
@@ -1175,7 +1175,7 @@ Replacing shell pipeline
 
 .. code-block:: bash
 
-   output=`dmesg | grep hda`
+   output=$(dmesg | grep hda)
 
 becomes::
 
@@ -1192,7 +1192,7 @@ be used directly:
 
 .. code-block:: bash
 
-   output=`dmesg | grep hda`
+   output=$(dmesg | grep hda)
 
 becomes::
 

Doc/tools/susp-ignored.csv

@@ -216,8 +216,6 @@ library/stdtypes,,:len,s[len(s):len(s)]
 library/stdtypes,,::,>>> y = m[::2]
 library/stdtypes,,::,>>> z = y[::-2]
 library/string,,`,"!""#$%&'()*+,-./:;<=>?@[\]^_`{|}~"
-library/subprocess,,`,"output=`dmesg | grep hda`"
-library/subprocess,,`,"output=`mycmd myarg`"
 library/tarfile,,:bz2,
 library/tarfile,,:compression,filemode[:compression]
 library/tarfile,,:gz,