maint: adjust quoting: emit '...', not `...' in diagnostics

* src/csplit.c (parse_repeat_count, extract_regexp): As above.
* src/date.c (main): Likewise.
* src/ls.c (decode_switches): Likewise.
* src/od.c (decode_one_format, main): Likewise.
* src/pathchk.c (no_leading_hyphen): Likewise.
* src/pr.c (main, getoptarg): Likewise.
* src/rm.c (diagnose_leading_hyphen): Likewise.
* src/sort.c (key_warnings, incompatible_options, main): Likewise.
* src/stat.c (print_esc_char): Print '\x', not `\x' in diagnostic.
* src/test.c (main): Likewise.
* src/touch.c (main): Likewise.
* src/tr.c (build_spec_list, validate, append_range): Likewise.
* tests/misc/mktemp: This is an unusual case, since the affected
string contains only the ` of an `...' string.  So we change
the long ` to a lone '.
* tests/pr/pr-tests: Manual quote adapting fix-up.
* tests/ln/hard-to-sym: Likewise.
* tests/split/suffix-length: Likewise.
* tests/mv/part-fail: Likewise.
* tests/misc/chcon: Likewise.
* tests/misc/stat-printf: Likewise.

19 files changed, 45 insertions, 45 deletions

diff --git a/src/csplit.c b/src/csplit.c
index 607092adf..6488b8412 100644
--- a/src/csplit.c
+++ b/src/csplit.c
@@ -1070,7 +1070,7 @@ parse_repeat_count (int argnum, struct control *p, char *str)
 
   end = str + strlen (str) - 1;
   if (*end != '}')
-    error (EXIT_FAILURE, 0, _("%s: `}' is required in repeat count"), str);
+    error (EXIT_FAILURE, 0, _("%s: '}' is required in repeat count"), str);
   *end = '\0';
 
   if (str+1 == end-1 && *(str+1) == '*')
@@ -1080,7 +1080,7 @@ parse_repeat_count (int argnum, struct control *p, char *str)
       if (xstrtoumax (str + 1, NULL, 10, &val, "") != LONGINT_OK)
         {
           error (EXIT_FAILURE, 0,
-                 _("%s}: integer required between `{' and `}'"),
+                 _("%s}: integer required between '{' and '}'"),
                  global_argv[argnum]);
         }
       p->repeat = val;
@@ -1107,7 +1107,7 @@ extract_regexp (int argnum, bool ignore, char const *str)
   closing_delim = strrchr (str + 1, delim);
   if (closing_delim == NULL)
     error (EXIT_FAILURE, 0,
-           _("%s: closing delimiter `%c' missing"), str, delim);
+           _("%s: closing delimiter '%c' missing"), str, delim);
 
   len = closing_delim - str - 1;
   p = new_control_record ();
diff --git a/src/date.c b/src/date.c
index 216d5db78..5fe80853b 100644
--- a/src/date.c
+++ b/src/date.c
@@ -451,9 +451,9 @@ main (int argc, char **argv)
       else if (set_date || option_specified_date)
         {
           error (0, 0,
-                 _("the argument %s lacks a leading `+';\n"
+                 _("the argument %s lacks a leading '+';\n"
                    "when using an option to specify date(s), any non-option\n"
-                   "argument must be a format string beginning with `+'"),
+                   "argument must be a format string beginning with '+'"),
                  quote (argv[optind]));
           usage (EXIT_FAILURE);
         }
diff --git a/src/ls.c b/src/ls.c
index b12f8773d..362c58dd0 100644
--- a/src/ls.c
+++ b/src/ls.c
@@ -2059,7 +2059,7 @@ decode_switches (int argc, char **argv)
               char const *const *p = time_style_args;
               while (*p)
                 fprintf (stderr, "  - [posix-]%s\n", *p++);
-              fputs (_("  - +FORMAT (e.g., +%H:%M) for a `date'-style"
+              fputs (_("  - +FORMAT (e.g., +%H:%M) for a 'date'-style"
                        " format\n"), stderr);
               usage (LS_FAILURE);
             }
diff --git a/src/od.c b/src/od.c
index 171e6c8c1..46a6abe80 100644
--- a/src/od.c
+++ b/src/od.c
@@ -816,7 +816,7 @@ this system doesn't provide a %lu-byte floating point type"),
       break;
 
     default:
-      error (0, 0, _("invalid character `%c' in type string %s"),
+      error (0, 0, _("invalid character '%c' in type string %s"),
              *s, quote (s_orig));
       return false;
     }
@@ -1598,7 +1598,7 @@ main (int argc, char **argv)
               break;
             default:
               error (EXIT_FAILURE, 0,
-                     _("invalid output address radix `%c'; \
+                     _("invalid output address radix '%c'; \
 it must be one character from [doxn]"),
                      optarg[0]);
               break;
diff --git a/src/pathchk.c b/src/pathchk.c
index b337a3ba5..56490a6b9 100644
--- a/src/pathchk.c
+++ b/src/pathchk.c
@@ -167,7 +167,7 @@ no_leading_hyphen (char const *file)
   for (p = file;  (p = strchr (p, '-'));  p++)
     if (p == file || p[-1] == '/')
       {
-        error (0, 0, _("leading `-' in a component of file name %s"),
+        error (0, 0, _("leading '-' in a component of file name %s"),
                quote (file));
         return false;
       }
diff --git a/src/pr.c b/src/pr.c
index 3e473fcb0..867ee83de 100644
--- a/src/pr.c
+++ b/src/pr.c
@@ -909,7 +909,7 @@ main (int argc, char **argv)
           {			/* dominates old opt +... */
             if (! optarg)
               error (EXIT_FAILURE, 0,
-                     _("`--pages=FIRST_PAGE[:LAST_PAGE]' missing argument"));
+                     _("'--pages=FIRST_PAGE[:LAST_PAGE]' missing argument"));
             else if (! first_last_page (oi, 0, optarg))
               error (EXIT_FAILURE, 0, _("invalid page range %s"),
                      quote (optarg));
@@ -976,7 +976,7 @@ main (int argc, char **argv)
                 || tmp_long <= 0 || tmp_long > INT_MAX)
               {
                 error (EXIT_FAILURE, 0,
-                       _("`-l PAGE_LENGTH' invalid number of lines: %s"),
+                       _("'-l PAGE_LENGTH' invalid number of lines: %s"),
                        quote (optarg));
               }
             lines_per_page = tmp_long;
@@ -1000,7 +1000,7 @@ main (int argc, char **argv)
                 || tmp_long > INT_MAX)
               {
                 error (EXIT_FAILURE, 0,
-                       _("`-N NUMBER' invalid starting line number: %s"),
+                       _("'-N NUMBER' invalid starting line number: %s"),
                        quote (optarg));
               }
             start_line_num = tmp_long;
@@ -1012,7 +1012,7 @@ main (int argc, char **argv)
             if (xstrtol (optarg, NULL, 10, &tmp_long, "") != LONGINT_OK
                 || tmp_long < 0 || tmp_long > INT_MAX)
               error (EXIT_FAILURE, 0,
-                     _("`-o MARGIN' invalid line offset: %s"), quote (optarg));
+                     _("'-o MARGIN' invalid line offset: %s"), quote (optarg));
             chars_per_margin = tmp_long;
             break;
           }
@@ -1053,7 +1053,7 @@ main (int argc, char **argv)
             if (xstrtol (optarg, NULL, 10, &tmp_long, "") != LONGINT_OK
                 || tmp_long <= 0 || tmp_long > INT_MAX)
               error (EXIT_FAILURE, 0,
-                     _("`-w PAGE_WIDTH' invalid number of characters: %s"),
+                     _("'-w PAGE_WIDTH' invalid number of characters: %s"),
                      quote (optarg));
             if (!truncate_lines)
               chars_per_line = tmp_long;
@@ -1067,7 +1067,7 @@ main (int argc, char **argv)
             if (xstrtol (optarg, NULL, 10, &tmp_long, "") != LONGINT_OK
                 || tmp_long <= 0 || tmp_long > INT_MAX)
               error (EXIT_FAILURE, 0,
-                     _("`-W PAGE_WIDTH' invalid number of characters: %s"),
+                     _("'-W PAGE_WIDTH' invalid number of characters: %s"),
                      quote (optarg));
             chars_per_line = tmp_long;
             break;
@@ -1197,7 +1197,7 @@ getoptarg (char *arg, char switch_char, char *character, int *number)
           || tmp_long <= 0 || tmp_long > INT_MAX)
         {
           error (0, 0,
-             _("`-%c' extra characters or invalid number in the argument: %s"),
+             _("'-%c' extra characters or invalid number in the argument: %s"),
                  switch_char, quote (arg));
           usage (EXIT_FAILURE);
         }
diff --git a/src/rm.c b/src/rm.c
index a5edfcf8f..e9d5a598f 100644
--- a/src/rm.c
+++ b/src/rm.c
@@ -115,7 +115,7 @@ diagnose_leading_hyphen (int argc, char **argv)
       if (arg[0] == '-' && arg[1] && lstat (arg, &st) == 0)
         {
           fprintf (stderr,
-                   _("Try `%s ./%s' to remove the file %s.\n"),
+                   _("Try '%s ./%s' to remove the file %s.\n"),
                    argv[0],
                    quotearg_n_style (1, shell_quoting_style, arg),
                    quote (arg));
diff --git a/src/sort.c b/src/sort.c
index dd7d56355..33f4ffe1c 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -2373,7 +2373,7 @@ key_warnings (struct keyfield const *gkey, bool gkey_only)
                       umaxtostr (eword + 1
                                  + (key->echar == SIZE_MAX), tmp));
             }
-          error (0, 0, _("obsolescent key `%s' used; consider `%s' instead"),
+          error (0, 0, _("obsolescent key '%s' used; consider '%s' instead"),
                  obuf, nbuf);
         }
 
@@ -2391,7 +2391,7 @@ key_warnings (struct keyfield const *gkey, bool gkey_only)
               || (!key->skipsblanks && key->schar)
               || (!key->skipeblanks && key->echar)))
         error (0, 0, _("leading blanks are significant in key %lu; "
-                       "consider also specifying `b'"), keynum);
+                       "consider also specifying 'b'"), keynum);
 
       /* Warn about numeric comparisons spanning fields,
          as field delimiters could be interpreted as part
@@ -2435,13 +2435,13 @@ key_warnings (struct keyfield const *gkey, bool gkey_only)
       char opts[sizeof short_options];
       key_to_opts (&ugkey, opts);
       error (0, 0,
-             ngettext ("option `-%s' is ignored",
-                       "options `-%s' are ignored",
+             ngettext ("option '-%s' is ignored",
+                       "options '-%s' are ignored",
                        select_plural (strlen (opts))), opts);
       ugkey.reverse = ugkey_reverse;
     }
   if (ugkey.reverse && !(stable || unique) && keylist)
-    error (0, 0, _("option `-r' only applies to last-resort comparison"));
+    error (0, 0, _("option '-r' only applies to last-resort comparison"));
 }
 
 /* Compare two lines A and B trying every key in sequence until there
@@ -3936,7 +3936,7 @@ static void incompatible_options (char const *) ATTRIBUTE_NORETURN;
 static void
 incompatible_options (char const *opts)
 {
-  error (SORT_FAILURE, 0, _("options `-%s' are incompatible"), opts);
+  error (SORT_FAILURE, 0, _("options '-%s' are incompatible"), opts);
   abort ();
 }
 
@@ -4244,10 +4244,10 @@ main (int argc, char **argv)
                         {
                           char const *optarg1 = argv[optind++];
                           s = parse_field_count (optarg1 + 1, &key->eword,
-                                             N_("invalid number after `-'"));
+                                             N_("invalid number after '-'"));
                           if (*s == '.')
                             s = parse_field_count (s + 1, &key->echar,
-                                               N_("invalid number after `.'"));
+                                               N_("invalid number after '.'"));
                           if (!key->echar && key->eword)
                             {
                               /* obsolescent syntax +A.x -B.y is equivalent to:
@@ -4333,7 +4333,7 @@ main (int argc, char **argv)
           if (*s == '.')
             {
               s = parse_field_count (s + 1, &key->schar,
-                                     N_("invalid number after `.'"));
+                                     N_("invalid number after '.'"));
               if (! key->schar--)
                 {
                   /* Provoke with `sort -k1.0' */
@@ -4352,7 +4352,7 @@ main (int argc, char **argv)
             {
               /* Get POS2. */
               s = parse_field_count (s + 1, &key->eword,
-                                     N_("invalid number after `,'"));
+                                     N_("invalid number after ','"));
               if (! key->eword--)
                 {
                   /* Provoke with `sort -k1,0' */
@@ -4361,7 +4361,7 @@ main (int argc, char **argv)
               if (*s == '.')
                 {
                   s = parse_field_count (s + 1, &key->echar,
-                                         N_("invalid number after `.'"));
+                                         N_("invalid number after '.'"));
                 }
               s = set_ordering (s, key, bl_end);
             }
diff --git a/src/stat.c b/src/stat.c
index 0d40d9952..a2a502978 100644
--- a/src/stat.c
+++ b/src/stat.c
@@ -1041,7 +1041,7 @@ print_esc_char (char c)
     case '\\':
       break;
     default:
-      error (0, 0, _("warning: unrecognized escape `\\%c'"), c);
+      error (0, 0, _("warning: unrecognized escape '\\%c'"), c);
       break;
     }
   putchar (c);
diff --git a/src/test.c b/src/test.c
index 5bf712aa8..66df2fa2e 100644
--- a/src/test.c
+++ b/src/test.c
@@ -855,7 +855,7 @@ main (int margc, char **margv)
             }
         }
       if (margc < 2 || !STREQ (margv[margc - 1], "]"))
-        test_syntax_error (_("missing `]'"), NULL);
+        test_syntax_error (_("missing ']'"), NULL);
 
       --margc;
     }
diff --git a/src/touch.c b/src/touch.c
index 70d7567a4..0879e431b 100644
--- a/src/touch.c
+++ b/src/touch.c
@@ -411,8 +411,8 @@ main (int argc, char **argv)
              would fail.  However, skip the warning if it ever fails.  */
           if (tm)
             error (0, 0,
-                   _("warning: `touch %s' is obsolete; use "
-                     "`touch -t %04ld%02d%02d%02d%02d.%02d'"),
+                   _("warning: 'touch %s' is obsolete; use "
+                     "'touch -t %04ld%02d%02d%02d%02d.%02d'"),
                    argv[optind],
                    tm->tm_year + 1900L, tm->tm_mon + 1, tm->tm_mday,
                    tm->tm_hour, tm->tm_min, tm->tm_sec);
diff --git a/src/tr.c b/src/tr.c
index 5dc065cf8..7efb0e389 100644
--- a/src/tr.c
+++ b/src/tr.c
@@ -670,7 +670,7 @@ append_range (struct Spec_list *list, unsigned char first, unsigned char last)
       char *tmp2 = make_printable_char (last);
 
       error (0, 0,
-       _("range-endpoints of `%s-%s' are in reverse collating sequence order"),
+       _("range-endpoints of '%s-%s' are in reverse collating sequence order"),
              tmp1, tmp2);
       free (tmp1);
       free (tmp2);
@@ -907,10 +907,10 @@ build_spec_list (const struct E_string *es, struct Spec_list *result)
                   if (opnd_str_len == 0)
                     {
                       if (p[i + 1] == ':')
-                        error (0, 0, _("missing character class name `[::]'"));
+                        error (0, 0, _("missing character class name '[::]'"));
                       else
                         error (0, 0,
-                               _("missing equivalence class character `[==]'"));
+                               _("missing equivalence class character '[==]'"));
                       return false;
                     }
 
@@ -1503,7 +1503,7 @@ when translating"));
             {
               error (EXIT_FAILURE, 0,
                      _("when translating, the only character classes that may \
-appear in\nstring2 are `upper' and `lower'"));
+appear in\nstring2 are 'upper' and 'lower'"));
             }
 
           validate_case_classes (s1, s2);
diff --git a/tests/ln/hard-to-sym b/tests/ln/hard-to-sym
index 3ea4570b1..044b10c0d 100755
--- a/tests/ln/hard-to-sym
+++ b/tests/ln/hard-to-sym
@@ -53,7 +53,7 @@ esac
 ln -s /no-such-dir || framework_failure_
 ln -L no-such-dir hard-to-dangle 2>err && fail=1
 case `cat err` in
-  *' accessing 'no-such-dir'\':*) ;;
+  *" accessing 'no-such-dir'":*) ;;
   *) fail=1 ;;
 esac
 ln -P no-such-dir hard-to-dangle || fail=1
@@ -64,12 +64,12 @@ mkdir d || framework_failure_
 ln -s d link-to-dir || framework_failure_
 ln -L link-to-dir hard-to-dir-link 2>err && fail=1
 case `cat err` in
-  *': 'link-to-dir'\'': hard link not allowed for directory'*) ;;
+  *": 'link-to-dir': hard link not allowed for directory"*) ;;
   *) fail=1 ;;
 esac
 ln -P link-to-dir/ hard-to-dir-link 2>err && fail=1
 case `cat err` in
-  *': 'link-to-dir/'\'': hard link not allowed for directory'*) ;;
+  *": 'link-to-dir/': hard link not allowed for directory"*) ;;
   *) fail=1 ;;
 esac
 ln -P link-to-dir hard-to-dir-link || fail=1
diff --git a/tests/misc/chcon b/tests/misc/chcon
index caa483143..6b4458034 100755
--- a/tests/misc/chcon
+++ b/tests/misc/chcon
@@ -71,7 +71,7 @@ EOF
 compare exp out || fail=1
 
 chcon --verbose -u$u1 f > out || fail=1
-echo 'changing security context of 'f'\' > exp
+echo "changing security context of 'f'" > exp
 compare exp out || fail=1
 
 Exit $fail
diff --git a/tests/misc/mktemp b/tests/misc/mktemp
index c6291fbb6..49dfde494 100755
--- a/tests/misc/mktemp
+++ b/tests/misc/mktemp
@@ -190,7 +190,7 @@ my @Tests =
      ['pipe-bad-tmpdir',
       {ENV => "TMPDIR=$bad_dir"},
       {ERR_SUBST => "s,($bad_dir/)[^']+': .*,\$1...,"},
-      {ERR => "$prog: failed to create file via template `$bad_dir/...\n"},
+      {ERR => "$prog: failed to create file via template '$bad_dir/...\n"},
       {EXIT => 1}],
      ['pipe-bad-tmpdir-u', '-u', {OUT => "$bad_dir/tmp.ZZZZZZZZZZ\n"},
       {ENV => "TMPDIR=$bad_dir"},
diff --git a/tests/misc/stat-printf b/tests/misc/stat-printf
index b576d250b..929b255e5 100755
--- a/tests/misc/stat-printf
+++ b/tests/misc/stat-printf
@@ -40,7 +40,7 @@ my @Tests =
      ['hex-1',   q!--printf='\x34\xf' .!,      {OUT=>"\x34\xf"}],
      ['hex-2',   q!--printf='.\x18p\xfq' .!,   {OUT=>".\x18p\x0fq"}],
      ['hex-3',   q!--printf='\x' .!,           {OUT=>'x'},
-         {ERR=>"$prog: warning: unrecognized escape `\\x'\n"}],
+         {ERR=>"$prog: warning: unrecognized escape '\\x'\n"}],
 
      # With --format, there *is* a trailing newline.
      ['f-nl', "--format=%n .",          {OUT=>".\n"}],
diff --git a/tests/mv/part-fail b/tests/mv/part-fail
index f5d2bb3ee..3a3e37f21 100755
--- a/tests/mv/part-fail
+++ b/tests/mv/part-fail
@@ -31,7 +31,7 @@ chmod u-w "$other_partition_tmpdir" || framework_failure_
 
 mv -f k "$other_partition_tmpdir" 2> out && fail=1
 printf \
-'mv: inter-device move failed: '%s'\'' to '%s'\'';'\
+"mv: inter-device move failed: '%s' to '%s';"\
 ' unable to remove target: Permission denied\n' \
   k "$other_partition_tmpdir/k" >exp
 
diff --git a/tests/pr/pr-tests b/tests/pr/pr-tests
index 2a333dc1e..2e1a80ca1 100755
--- a/tests/pr/pr-tests
+++ b/tests/pr/pr-tests
@@ -387,7 +387,7 @@ my @tv = (
 ['col-0', '-0', '', '', 1,
  "$prog: invalid number of columns: '0'\n"],
 ['col-inval', '-'.'9'x100, '', '', 1,
- "$prog: invalid number of columns: `". ('9'x100) ."'\n"],
+ "$prog: invalid number of columns: '". ('9'x100) ."'\n"],
 
 # Before coreutils-5.3.1, --pages=1:-1 would be treated like
 # --pages=1:18446744073709551615.
diff --git a/tests/split/suffix-length b/tests/split/suffix-length
index 7779ef2f8..bc65e9f6d 100755
--- a/tests/split/suffix-length
+++ b/tests/split/suffix-length
@@ -31,7 +31,7 @@ done
 files="${files}xba"
 
 for f in $files; do
-  printf 'creating file `%s'\''\n' $f
+  printf "creating file '%s'"'\n' $f
 done > exp || framework_failure_
 
 echo split: output file suffixes exhausted \