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.

1 files changed, 25 insertions, 25 deletions

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