--- a/msvc/include/getopt.h
+++ b/msvc/include/getopt.h
@@ -22,7 +22,7 @@
 #ifndef _GETOPT_H
 #define _GETOPT_H 1
 
-#ifdef	__cplusplus
+#ifdef  __cplusplus
 extern "C"
 {
 #endif
@@ -33,7 +33,7 @@
    Also, when `ordering' is RETURN_IN_ORDER,
    each non-option ARGV-element is returned here.  */
 
-	extern char *optarg;
+        extern char *optarg;
 
 /* Index in ARGV of the next element to be scanned.
    This is used for communication to and from the caller
@@ -47,16 +47,16 @@
    Otherwise, `optind' communicates from one call to the next
    how much of ARGV has been scanned so far.  */
 
-	extern int optind;
+        extern int optind;
 
 /* Callers store zero here to inhibit the error message `getopt' prints
    for unrecognized options.  */
 
-	extern int opterr;
+        extern int opterr;
 
 /* Set to an option character which was unrecognized.  */
 
-	extern int optopt;
+        extern int optopt;
 
 /* Describe the long-named options requested by the application.
    The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
@@ -79,56 +79,56 @@
    one).  For long options that have a zero `flag' field, `getopt'
    returns the contents of the `val' field.  */
 
-	struct option
-	{
+        struct option
+        {
 #if defined (__STDC__) && __STDC__
-		const char *name;
+                const char *name;
 #else
-		char *name;
+                char *name;
 #endif
-		/* has_arg can't be an enum because some compilers complain about
-		   type mismatches in all the code that assumes it is an int.  */
-		int has_arg;
-		int *flag;
-		int val;
-	};
+                /* has_arg can't be an enum because some compilers complain about
+                   type mismatches in all the code that assumes it is an int.  */
+                int has_arg;
+                int *flag;
+                int val;
+        };
 
 /* Names for the values of the `has_arg' field of `struct option'.  */
 
-#define	no_argument		0
-#define required_argument	1
-#define optional_argument	2
+#define no_argument             0
+#define required_argument       1
+#define optional_argument       2
 
 #if defined (__STDC__) && __STDC__
 #ifdef __GNU_LIBRARY__
 /* Many other libraries have conflicting prototypes for getopt, with
    differences in the consts, in stdlib.h.  To avoid compilation
    errors, only prototype getopt for the GNU C library.  */
-	extern int getopt(int argc, char *const *argv, const char *shortopts);
-#else				/* not __GNU_LIBRARY__ */
-	extern int getopt();
-#endif				/* __GNU_LIBRARY__ */
-	extern int getopt_long(int argc, char *const *argv, const char *shortopts,
-			       const struct option *longopts, int *longind);
-	extern int getopt_long_only(int argc, char *const *argv,
-				    const char *shortopts,
-			       const struct option *longopts, int *longind);
+        extern int getopt(int argc, char *const *argv, const char *shortopts);
+#else                           /* not __GNU_LIBRARY__ */
+        extern int getopt();
+#endif                          /* __GNU_LIBRARY__ */
+        extern int getopt_long(int argc, char *const *argv, const char *shortopts,
+                               const struct option *longopts, int *longind);
+        extern int getopt_long_only(int argc, char *const *argv,
+                                    const char *shortopts,
+                               const struct option *longopts, int *longind);
 
 /* Internal only.  Users should not call this directly.  */
-	extern int _getopt_internal(int argc, char *const *argv,
-				    const char *shortopts,
-				const struct option *longopts, int *longind,
-				    int long_only);
-#else				/* not __STDC__ */
-	extern int getopt();
-	extern int getopt_long();
-	extern int getopt_long_only();
+        extern int _getopt_internal(int argc, char *const *argv,
+                                    const char *shortopts,
+                                const struct option *longopts, int *longind,
+                                    int long_only);
+#else                           /* not __STDC__ */
+        extern int getopt();
+        extern int getopt_long();
+        extern int getopt_long_only();
 
-	extern int _getopt_internal();
-#endif				/* __STDC__ */
+        extern int _getopt_internal();
+#endif                          /* __STDC__ */
 
-#ifdef	__cplusplus
+#ifdef  __cplusplus
 }
 #endif
 
-#endif				/* _GETOPT_H */
+#endif                          /* _GETOPT_H */