the manual for rpmdev-bumpspec contains a minor typo:
{{{
-u USERSTRING, --userstring=USERSTRING
user name+email string (default: output from rpmdevpackager(1))
}}}
"rpmdevpackager(1)" should be rather "rpmdev-packager(1)"

I've stumbled over this when I've tried to understand where rpmbdev-bumpspec gets the default for the user string. ;-)

Unfortunately the problems is caused by a strange behavior of help2man together with python's optparse library:

rpmdev-bumpspec:
{{{
...
parser.add_option("-u", "--userstring", default=userstring,
help="user name+email string (default: output from "+
"rpmdev-packager(1))")
...
}}}
This is automatically formatted by the optparse library when the help is requested via
./rpmdev-bumpspec --help and so the textwrap library will break the line exactly at "rpmdev-" and the new line starts with "packager(1)". The help2man thinks the minus is just because the line break and so it puts both strings together again. ;-)

Sure, that's just a minor problem however it is misleading right now...

Since it doesn't look like that it is possible to get the textwrap library to not break lines at "-" the most easy fix would be to change the layout of the help text to fit into one line:
{{{
--- a/rpmdev-bumpspec
+++ b/rpmdev-bumpspec
@@ -180,7 +180,7 @@ the Free Software Foundation; either version 2 of the Licens
parser.add_option("-c", "--comment", default='- rebuilt',
help="changelog comment (default: \"- rebuilt\")")
parser.add_option("-u", "--userstring", default=userstring,
- help="user name+email string (default: output from "+
+ help="user name+email (default: output "+
"rpmdev-packager(1))")
parser.add_option("-r", "--rightmost", default=False, action='store_true',
help="bump the rightmost integer or add a .1")
}}}