Fix some regressions caused by r369553 on old versions of Debian and Ubuntu

It was causing some errors like:

Encoding error:
'ascii' codec can't decode byte 0xe2 in position 341: ordinal not in range(128)
The full traceback has been saved in /tmp/sphinx-err-y2fq4dtb.log, if you want to report the issue to the developers.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@369644 91177308-0d34-0410-b5e6-96231b3b80d8

docs/CommandGuide/llvm-ranlib.rst

@@ -12,7 +12,7 @@ DESCRIPTION
 -----------
 
 :program:`llvm-ranlib` is an alias for the :doc:`llvm-ar <llvm-ar>` tool that
-generates an index for an archive. It can be used as a replacement for GNU’s
+generates an index for an archive. It can be used as a replacement for GNU's
 :program:`ranlib` tool.
 
 Running :program:`llvm-ranlib` is equivalent to running ``llvm-ar s``.

docs/CommandGuide/llvm-size.rst

@@ -12,4 +12,4 @@ DESCRIPTION
 -----------
 
 :program:`llvm-size` is a tool that prints size information for object files.
-The goal is to make it a drop-in replacement for GNU’s :program:`size`.
+The goal is to make it a drop-in replacement for GNU's :program:`size`.

docs/CommandGuide/llvm-strings.rst

@@ -12,4 +12,4 @@ DESCRIPTION
 -----------
 
 :program:`llvm-strings` is a tool that prints strings in files. The goal is to
-make it a drop-in replacement for GNU’s :program:`strings`.
+make it a drop-in replacement for GNU's :program:`strings`.