tests: change `...' to '...' on lines not matching /[=\$]/

Exempt lines with '$' or '=', since those are prone to improper
conversion.  Run this:
  git grep -l "\`[^']*'" tests \
   |xargs perl -pi -e '/[=\$]/ and next;s/\`([^'\''"]*?'\'')/'\''$1/g'

1 files changed, 5 insertions, 5 deletions

diff --git a/tests/init.cfg b/tests/init.cfg
index 437969840..fda82bc02 100644
--- a/tests/init.cfg
+++ b/tests/init.cfg
@@ -153,7 +153,7 @@ require_setfacl_()
     || skip_ "setfacl does not work on the current file system"
 }
 
-# Require a controlling input `terminal'.
+# Require a controlling input 'terminal'.
 require_controlling_input_terminal_()
 {
   tty -s || have_input_tty=no
@@ -231,7 +231,7 @@ rwx_to_mode_()
   # s  xs
   # T  t
   # t  xt
-  # The `T' and `t' ones are only valid for `other'.
+  # The 'T' and 't' ones are only valid for 'other'.
   s='s/S/@/;s/s/x@/;s/@/s/'
   t='s/T/@/;s/t/x@/;s/@/t/'
 
@@ -310,7 +310,7 @@ require_root_()
 
 skip_if_root_() { uid_is_privileged_ && skip_ "must be run as non-root"; }
 
-# Set `groups' to a space-separated list of at least two groups
+# Set 'groups' to a space-separated list of at least two groups
 # of which the user is a member.
 require_membership_in_two_groups_()
 {
@@ -321,7 +321,7 @@ require_membership_in_two_groups_()
     *' '*) ;;
     *) skip_ 'requires membership in two groups
 this test requires that you be a member of more than one group,
-but running `id -G'\'' either failed or found just one.  If you really
+but running 'id -G'\'' either failed or found just one.  If you really
 are a member of at least two groups, then rerun this test with
 COREUTILS_GROUPS set in your environment to the space-separated list
 of group names or numbers.  E.g.,
@@ -398,7 +398,7 @@ mkfifo_or_skip_()
     # Make an exception of this case -- usually we interpret framework-creation
     # failure as a test failure.  However, in this case, when running on a SunOS
     # system using a disk NFS mounted from OpenBSD, the above fails like this:
-    # mkfifo: cannot make fifo `fifo-10558': Not owner
+    # mkfifo: cannot make fifo 'fifo-10558': Not owner
     skip_ 'unable to create a fifo'
   fi
 }