getopt: merge from gnulib: don't use `...' quotes

I'm not sure whether this is official GNU style now, but `...' quotes
haven't looked properly balanced in most people's terminal fonts since
2001ish? and gnulib has chosen to switch over to '...' quotes.
I'm merging this separately from the other changes in gnulib because
it's very mechanical.

	* posix/getopt.c, posix/getopt.h, posix/getopt1.c, posix/getopt_int.h:
	Use '...' instead of `...' for quotation marks inside
	comments and strings.

5 files changed, 70 insertions, 66 deletions

diff --git a/ChangeLog b/ChangeLog
index aaa08dff2c..c53c80ec6f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2017-04-07  Zack Weinberg  <zackw@panix.com>
 
+	* posix/getopt.c, posix/getopt.h, posix/getopt1.c, posix/getopt_int.h:
+	Use '...' instead of `...' for quotation marks inside
+	comments and strings.
+
 	* config.h.in (USE_NONOPTION_FLAGS): Remove.
 	* csu/init-first.c: Remove all #ifdef USE_NONOPTION_FLAGS blocks.
 	* sysdeps/mach/hurd/i386/init-first.c: Likewise.
diff --git a/posix/getopt.c b/posix/getopt.c
index 6a28ed6e50..ac2b0cfa93 100644
--- a/posix/getopt.c
+++ b/posix/getopt.c
@@ -36,7 +36,7 @@
    Library, but also included in many other GNU distributions.  Compiling
    and linking in this code is a waste when using the GNU C library
    (especially if it is a shared library).  Rather than having every GNU
-   program understand `configure --with-gnu-libc' and omit the object files,
+   program understand 'configure --with-gnu-libc' and omit the object files,
    it is simpler to just do this in the source for each such file.  */
 
 #define GETOPT_INTERFACE_VERSION 2
@@ -80,11 +80,11 @@
 # define attribute_hidden
 #endif
 
-/* This version of `getopt' appears to the caller like standard Unix `getopt'
+/* This version of 'getopt' appears to the caller like standard Unix 'getopt'
    but it behaves differently for the user, since it allows the user
    to intersperse the options with the other arguments.
 
-   As `getopt' works, it permutes the elements of ARGV so that,
+   As 'getopt' works, it permutes the elements of ARGV so that,
    when it is done, all the options precede everything else.  Thus
    all application programs are extended to handle flexible argument order.
 
@@ -97,24 +97,24 @@
 #include "getopt.h"
 #include "getopt_int.h"
 
-/* For communication from `getopt' to the caller.
-   When `getopt' finds an option that takes an argument,
+/* For communication from 'getopt' to the caller.
+   When 'getopt' finds an option that takes an argument,
    the argument value is returned here.
-   Also, when `ordering' is RETURN_IN_ORDER,
+   Also, when 'ordering' is RETURN_IN_ORDER,
    each non-option ARGV-element is returned here.  */
 
 char *optarg;
 
 /* Index in ARGV of the next element to be scanned.
    This is used for communication to and from the caller
-   and for communication between successive calls to `getopt'.
+   and for communication between successive calls to 'getopt'.
 
-   On entry to `getopt', zero means this is the first call; initialize.
+   On entry to 'getopt', zero means this is the first call; initialize.
 
-   When `getopt' returns -1, this is the index of the first of the
+   When 'getopt' returns -1, this is the index of the first of the
    non-option elements that the caller should itself scan.
 
-   Otherwise, `optind' communicates from one call to the next
+   Otherwise, 'optind' communicates from one call to the next
    how much of ARGV has been scanned so far.  */
 
 /* 1003.2 says this must be 1 before any call.  */
@@ -153,7 +153,7 @@ extern char *getenv ();
    The other is elements [last_nonopt,optind), which contains all
    the options processed since those non-options were skipped.
 
-   `first_nonopt' and `last_nonopt' are relocated so that they describe
+   'first_nonopt' and 'last_nonopt' are relocated so that they describe
    the new indices of the non-options in ARGV after they are moved.  */
 
 static void
@@ -252,48 +252,48 @@ _getopt_initialize (int argc, char *const *argv, const char *optstring,
 
    If an element of ARGV starts with '-', and is not exactly "-" or "--",
    then it is an option element.  The characters of this element
-   (aside from the initial '-') are option characters.  If `getopt'
+   (aside from the initial '-') are option characters.  If 'getopt'
    is called repeatedly, it returns successively each of the option characters
    from each of the option elements.
 
-   If `getopt' finds another option character, it returns that character,
-   updating `optind' and `nextchar' so that the next call to `getopt' can
+   If 'getopt' finds another option character, it returns that character,
+   updating 'optind' and 'nextchar' so that the next call to 'getopt' can
    resume the scan with the following option character or ARGV-element.
 
-   If there are no more option characters, `getopt' returns -1.
-   Then `optind' is the index in ARGV of the first ARGV-element
+   If there are no more option characters, 'getopt' returns -1.
+   Then 'optind' is the index in ARGV of the first ARGV-element
    that is not an option.  (The ARGV-elements have been permuted
    so that those that are not options now come last.)
 
    OPTSTRING is a string containing the legitimate option characters.
    If an option character is seen that is not listed in OPTSTRING,
-   return '?' after printing an error message.  If you set `opterr' to
+   return '?' after printing an error message.  If you set 'opterr' to
    zero, the error message is suppressed but we still return '?'.
 
    If a char in OPTSTRING is followed by a colon, that means it wants an arg,
    so the following text in the same ARGV-element, or the text of the following
-   ARGV-element, is returned in `optarg'.  Two colons mean an option that
+   ARGV-element, is returned in 'optarg'.  Two colons mean an option that
    wants an optional arg; if there is text in the current ARGV-element,
-   it is returned in `optarg', otherwise `optarg' is set to zero.
+   it is returned in 'optarg', otherwise 'optarg' is set to zero.
 
-   If OPTSTRING starts with `-' or `+', it requests different methods of
+   If OPTSTRING starts with '-' or '+', it requests different methods of
    handling the non-option ARGV-elements.
    See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
 
-   Long-named options begin with `--' instead of `-'.
+   Long-named options begin with '--' instead of '-'.
    Their names may be abbreviated as long as the abbreviation is unique
    or is an exact match for some defined option.  If they have an
    argument, it follows the option name in the same ARGV-element, separated
-   from the option name by a `=', or else the in next ARGV-element.
-   When `getopt' finds a long-named option, it returns 0 if that option's
-   `flag' field is nonzero, the value of the option's `val' field
-   if the `flag' field is zero.
+   from the option name by a '=', or else the in next ARGV-element.
+   When 'getopt' finds a long-named option, it returns 0 if that option's
+   'flag' field is nonzero, the value of the option's 'val' field
+   if the 'flag' field is zero.
 
    The elements of ARGV aren't really const, because we permute them.
    But we pretend they're const in the prototype to be compatible
    with other systems.
 
-   LONGOPTS is a vector of `struct option' terminated by an
+   LONGOPTS is a vector of 'struct option' terminated by an
    element containing a name which is zero.
 
    LONGIND returns the index in LONGOPT of the long-named option found.
@@ -361,7 +361,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
 	  d->__last_nonopt = d->optind;
 	}
 
-      /* The special ARGV-element `--' means premature end of options.
+      /* The special ARGV-element '--' means premature end of options.
 	 Skip it like a null option,
 	 then exchange with previous non-options as if it were an option,
 	 then skip everything else like a non-option.  */
@@ -733,7 +733,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
     char c = *d->__nextchar++;
     char *temp = strchr (optstring, c);
 
-    /* Increment `optind' when we start to process its last character.  */
+    /* Increment 'optind' when we start to process its last character.  */
     if (*d->__nextchar == '\0')
       ++d->optind;
 
@@ -832,7 +832,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
 	    return c;
 	  }
 	else
-	  /* We already incremented `d->optind' once;
+	  /* We already incremented 'd->optind' once;
 	     increment it again when taking next ARGV-elt as argument.  */
 	  d->optarg = argv[d->optind++];
 
@@ -1059,7 +1059,7 @@ _getopt_internal_r (int argc, char *const *argv, const char *optstring,
 		  c = '?';
 	      }
 	    else
-	      /* We already incremented `optind' once;
+	      /* We already incremented 'optind' once;
 		 increment it again when taking next ARGV-elt as argument.  */
 	      d->optarg = argv[d->optind++];
 	    d->__nextchar = NULL;
@@ -1115,7 +1115,7 @@ __posix_getopt (int argc, char *const *argv, const char *optstring)
 #ifdef TEST
 
 /* Compile with -DTEST to make an executable for use in testing
-   the above definition of `getopt'.  */
+   the above definition of 'getopt'.  */
 
 int
 main (int argc, char **argv)
diff --git a/posix/getopt.h b/posix/getopt.h
index 435329312a..c83a186beb 100644
--- a/posix/getopt.h
+++ b/posix/getopt.h
@@ -48,29 +48,29 @@
 extern "C" {
 #endif
 
-/* For communication from `getopt' to the caller.
-   When `getopt' finds an option that takes an argument,
+/* For communication from 'getopt' to the caller.
+   When 'getopt' finds an option that takes an argument,
    the argument value is returned here.
-   Also, when `ordering' is RETURN_IN_ORDER,
+   Also, when 'ordering' is RETURN_IN_ORDER,
    each non-option ARGV-element is returned here.  */
 
 extern char *optarg;
 
 /* Index in ARGV of the next element to be scanned.
    This is used for communication to and from the caller
-   and for communication between successive calls to `getopt'.
+   and for communication between successive calls to 'getopt'.
 
-   On entry to `getopt', zero means this is the first call; initialize.
+   On entry to 'getopt', zero means this is the first call; initialize.
 
-   When `getopt' returns -1, this is the index of the first of the
+   When 'getopt' returns -1, this is the index of the first of the
    non-option elements that the caller should itself scan.
 
-   Otherwise, `optind' communicates from one call to the next
+   Otherwise, 'optind' communicates from one call to the next
    how much of ARGV has been scanned so far.  */
 
 extern int optind;
 
-/* Callers store zero here to inhibit the error message `getopt' prints
+/* Callers store zero here to inhibit the error message 'getopt' prints
    for unrecognized options.  */
 
 extern int opterr;
@@ -82,24 +82,24 @@ extern int optopt;
 #ifndef __need_getopt
 /* Describe the long-named options requested by the application.
    The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
-   of `struct option' terminated by an element containing a name which is
+   of 'struct option' terminated by an element containing a name which is
    zero.
 
-   The field `has_arg' is:
+   The field 'has_arg' is:
    no_argument		(or 0) if the option does not take an argument,
    required_argument	(or 1) if the option requires an argument,
    optional_argument 	(or 2) if the option takes an optional argument.
 
-   If the field `flag' is not NULL, it points to a variable that is set
-   to the value given in the field `val' when the option is found, but
+   If the field 'flag' is not NULL, it points to a variable that is set
+   to the value given in the field 'val' when the option is found, but
    left unchanged if the option is not found.
 
-   To have a long-named option do something other than set an `int' to
-   a compiled-in constant, such as set a value from `optarg', set the
-   option's `flag' field to zero and its `val' field to a nonzero
+   To have a long-named option do something other than set an 'int' to
+   a compiled-in constant, such as set a value from 'optarg', set the
+   option's 'flag' field to zero and its 'val' field to a nonzero
    value (the equivalent single-letter option character, if there is
-   one).  For long options that have a zero `flag' field, `getopt'
-   returns the contents of the `val' field.  */
+   one).  For long options that have a zero 'flag' field, 'getopt'
+   returns the contents of the 'val' field.  */
 
 struct option
 {
@@ -111,7 +111,7 @@ struct option
   int val;
 };
 
-/* Names for the values of the `has_arg' field of `struct option'.  */
+/* Names for the values of the 'has_arg' field of 'struct option'.  */
 
 # define no_argument		0
 # define required_argument	1
@@ -125,23 +125,23 @@ struct option
 
    Return the option character from OPTS just read.  Return -1 when
    there are no more options.  For unrecognized options, or options
-   missing arguments, `optopt' is set to the option letter, and '?' is
+   missing arguments, 'optopt' is set to the option letter, and '?' is
    returned.
 
    The OPTS string is a list of characters which are recognized option
    letters, optionally followed by colons, specifying that that letter
-   takes an argument, to be placed in `optarg'.
+   takes an argument, to be placed in 'optarg'.
 
    If a letter in OPTS is followed by two colons, its argument is
-   optional.  This behavior is specific to the GNU `getopt'.
+   optional.  This behavior is specific to the GNU 'getopt'.
 
-   The argument `--' causes premature termination of argument
-   scanning, explicitly telling `getopt' that there are no more
+   The argument '--' causes premature termination of argument
+   scanning, explicitly telling 'getopt' that there are no more
    options.
 
-   If OPTS begins with `--', then non-option arguments are treated as
+   If OPTS begins with '--', then non-option arguments are treated as
    arguments to the option '\0'.  This behavior is specific to the GNU
-   `getopt'.  */
+   'getopt'.  */
 
 #ifdef __GNU_LIBRARY__
 /* Many other libraries have conflicting prototypes for getopt, with
diff --git a/posix/getopt1.c b/posix/getopt1.c
index 09c69fd412..b9a853804a 100644
--- a/posix/getopt1.c
+++ b/posix/getopt1.c
@@ -34,7 +34,7 @@
    Library, but also included in many other GNU distributions.  Compiling
    and linking in this code is a waste when using the GNU C library
    (especially if it is a shared library).  Rather than having every GNU
-   program understand `configure --with-gnu-libc' and omit the object files,
+   program understand 'configure --with-gnu-libc' and omit the object files,
    it is simpler to just do this in the source for each such file.  */
 
 #define GETOPT_INTERFACE_VERSION 2
@@ -161,11 +161,11 @@ main (int argc, char **argv)
 	  break;
 
 	case 'c':
-	  printf ("option c with value `%s'\n", optarg);
+	  printf ("option c with value '%s'\n", optarg);
 	  break;
 
 	case 'd':
-	  printf ("option d with value `%s'\n", optarg);
+	  printf ("option d with value '%s'\n", optarg);
 	  break;
 
 	case '?':
diff --git a/posix/getopt_int.h b/posix/getopt_int.h
index 71b9655549..ac6ddefac3 100644
--- a/posix/getopt_int.h
+++ b/posix/getopt_int.h
@@ -62,7 +62,7 @@ struct _getopt_data
      stop option processing when the first non-option is seen.
      This is what Unix does.
      This mode of operation is selected by either setting the environment
-     variable POSIXLY_CORRECT, or using `+' as the first character
+     variable POSIXLY_CORRECT, or using '+' as the first character
      of the list of option characters.
 
      PERMUTE is the default.  We permute the contents of ARGV as we
@@ -74,12 +74,12 @@ struct _getopt_data
      written to expect options and other ARGV-elements in any order
      and that care about the ordering of the two.  We describe each
      non-option ARGV-element as if it were the argument of an option
-     with character code 1.  Using `-' as the first character of the
+     with character code 1.  Using '-' as the first character of the
      list of option characters selects this mode of operation.
 
-     The special argument `--' forces an end of option-scanning regardless
-     of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
-     `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
+     The special argument '--' forces an end of option-scanning regardless
+     of the value of 'ordering'.  In the case of RETURN_IN_ORDER, only
+     '--' can cause 'getopt' to return -1 with 'optind' != ARGC.  */
 
   enum
     {
@@ -93,8 +93,8 @@ struct _getopt_data
   /* Handle permutation of arguments.  */
 
   /* Describe the part of ARGV that contains non-options that have
-     been skipped.  `first_nonopt' is the index in ARGV of the first
-     of them; `last_nonopt' is the index after the last of them.  */
+     been skipped.  'first_nonopt' is the index in ARGV of the first
+     of them; 'last_nonopt' is the index after the last of them.  */
 
   int __first_nonopt;
   int __last_nonopt;