.Sh SYNOPSIS
.Fd #include <pthread.h>
.Ft int
-.Fn pthread_mutex_unlock "pthread_mutex_t *mutex"
+.Fo pthread_mutex_unlock
+.Fa "pthread_mutex_t *mutex"
+.Fc
.Sh DESCRIPTION
If the current thread holds the lock on
.Fa mutex ,
.Sh RETURN VALUES
If successful,
.Fn pthread_mutex_unlock
-will return zero, otherwise an error number will be returned to
-indicate the error.
+will return zero.
+Otherwise, an error number will be returned to indicate the error.
.Sh ERRORS
-.Fn pthread_mutex_trylock
+.Fn pthread_mutex_unlock
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL