1 --- isblank.3 2004-11-25 11:38:17.000000000 -0800
2 +++ isblank.3.edit 2006-08-09 13:23:09.000000000 -0700
10 -successful test is limited to this characters only.
11 +successful test is limited to these characters only.
17 the value of the argument is
21 returns non-zero if the character tests true.