diff --git a/uiowa-threads.c b/uiowa-threads.c
index 839204d..00b902e 100644
--- a/uiowa-threads.c
+++ b/uiowa-threads.c
@@ -1,7 +1,7 @@
 /****
  * file threads.c
  *
-   A partial implementation of a user-level thread package  
+   A partial implementation of a user-level thread package
    Written by Douglas Jones,                  Feb 17, 1998
    Updated with minor bug fix in thread_exit, Feb 19, 1998
    Updated so free called on original stack,  Feb 19, 2002
@@ -39,7 +39,7 @@
  * This is the key to user-level context switching *
                                                 ****/
 /****                                                         *
- *  tools used by studyit to understand jump buffer structure * 
+ *  tools used by studyit to understand jump buffer structure *
  *                                                         ****/
 static int * low_bound;		/* below probe on stack */
 static int * probe_local;	/* local to probe on stack */
@@ -64,7 +64,7 @@ jmp_buf probe_record;  		/* nonzero entries mean fields that change */
 
 /****
  * code to explore the activation record *
- * and jump buffer structure             *       
+ * and jump buffer structure             *
                                       ****/
 void boundhigh()
 /* purpose:  set high_bound to a local variable beyond probe on stack */
@@ -152,7 +152,7 @@ static void studyit()
 					}
 				}
 			}
- 			
+
 			p++, sameAR++, samePC++, probe_rec++;
 		}
 
@@ -195,7 +195,7 @@ void thread_startup_report()
                                         ****/
 
 /****                *
- * thread data types * 
+ * thread data types *
  *                ****/
 
 struct thread {
@@ -229,7 +229,7 @@ static jmp_buf thread_death;           /* used on thread package death */
 static jmp_buf go_free_it;             /* used to call free from original stk */
 
 /****                              *
- * code for thread_queue data type * 
+ * code for thread_queue data type *
  *                              ****/
 
 static void thread_queue_init( struct thread_queue * q )
@@ -266,7 +266,7 @@ static struct thread * thread_dequeue( struct thread_queue * q )
 }
 
 /****                                       *
- * user callable thread management routines * 
+ * user callable thread management routines *
  *                                       ****/
 
 void thread_manager_init()