lib: Fix several typos and minor errors

- duplicate words
- typos
- references to old versions of FreeBSD

Reviewed by:	imp, benno

lib/libc/include/reentrant.h

@@ -67,7 +67,7 @@
  * Implementation Details:
  * 
  * The mutex primitives used by the library (mutex_t, mutex_lock, etc.)
- * are macros which expand to the cooresponding primitives provided by
+ * are macros which expand to the corresponding primitives provided by
  * the thread engine or to nothing.  The latter is used so that code is
  * not unreasonably cluttered with #ifdefs when all thread safe support
  * is removed.

lib/libc/sparc64/fpu/fpu_reg.h

@@ -31,7 +31,7 @@
 #define _LIBC_SPARC64_FPU_FPU_REG_H_
 
 /*
- * These are not really of type char[]. They are are arrays of functions defined
+ * These are not really of type char[]. They are arrays of functions defined
  * in fpu_reg.S; each array member loads/stores a certain fpu register of the
  * given size.
  */

lib/libedit/map.c

@@ -370,7 +370,7 @@ private const el_action_t  el_map_vi_insert[] = {
 				 * NOTE: These mappings do NOT Correspond well
 				 * to the KSH VI editing assignments.
 				 * On the other and they are convenient and
-				 * many people have have gotten used to them.
+				 * many people have gotten used to them.
 				 */
 	/*   0 */	ED_UNASSIGNED,		/* ^@ */
 	/*   1 */	ED_MOVE_TO_BEG,		/* ^A */

lib/libedit/refresh.c

@@ -1148,7 +1148,7 @@ re_fastaddc(EditLine *el)
 
 
 /* re_clear_display():
- *	clear the screen buffers so that new new prompt starts fresh.
+ *	clear the screen buffers so that new prompt starts fresh.
  */
 protected void
 re_clear_display(EditLine *el)

lib/libefivar/uefi-dputil.c

@@ -134,7 +134,7 @@ GetDevicePathSize (
   @param  MaxSize     The maximum size of the device path data structure.
 
   @retval TRUE        DevicePath is valid.
-  @retval FALSE       The length of any node node in the DevicePath is less
+  @retval FALSE       The length of any node in the DevicePath is less
                       than sizeof (EFI_DEVICE_PATH_PROTOCOL).
   @retval FALSE       If MaxSize is not zero, the size of the DevicePath
                       exceeds MaxSize.

lib/msun/src/catrig.c

@@ -611,7 +611,7 @@ catanh(double complex z)
 	if (ax < SQRT_3_EPSILON / 2 && ay < SQRT_3_EPSILON / 2) {
 		/*
 		 * z = 0 was filtered out above.  All other cases must raise
-		 * inexact, but this is the only only that needs to do it
+		 * inexact, but this is the only case that needs to do it
 		 * explicitly.
 		 */
 		raise_inexact();