Match against 'abbbbbbc'
               01234567

1) ok!                                    pos = 0. (zw)
2) ok!   Found an 'a' at pos 0.           pos = 1.
3) ok!   Found 6 'b's at pos 1 through 6. pos = 7.
4) fail! Did not find a 'b' at pos 7.     Backtrack!
3) ok!   Found 5 'b's at pos 1 through 5. pos = 6.
4) ok!   Found a 'b' at pos 6.            pos = 7.
5) ok!   Found a 'c' at pos 7.            pos = 8.
Match!

##</code><code>##

Match against 'root: email'
               01234567890

1) ok!                                                 pos = 0. (zw)
2) ok!   Found a 'root:' at pos 0 through 4.           pos = 5.
3) ok!   Found 1 '\s' at pos 5.                        pos = 6.
4) fail! Found 'email' at pos 6 through 10.            Backtrack!
3) ok!   Found 0 '\s' at pos 5.                        pos = 5. (zw)
4) ok!   Found something other than 'email' at pos 5.  pos = 5. (zwla)
         (found ' email')
Match!

##</code><code>##

Match against 'root: email'
               01234567890

1) ok!                                                 pos = 0. (zw)
2) ok!   Found a 'root:' at pos 0 through 4.           pos = 5.
3) ok!   Found 1 '\s' at pos 5.                        pos = 6.
4) fail! Found 'email' at pos 6 through 10.            Backtrack!
3) ok!   Found 0 '\s' at pos 5.                        pos = 5. (zw)
4) ok!   Found something other than 'email' at pos 5.  pos = 5. (zwla)
         (found ' email')
5) fail! Did not find a '\S' at pos 5.                 Backtrack!
Nothing more to try.
No match!

##</code><code>##

Match against 'root: hisemail'
               01234567890123

1) ok!                                                 pos = 0. (zw)
2) ok!   Found a 'root:' at pos 0 through 4.           pos = 5.
3) ok!   Found 1 '\s' at pos 5.                        pos = 6.
4) ok!   Found something other than 'email' at pos 6.  pos = 6. (zwla)
         (found 'hisemail')
5) ok!   Found a '\S' at pos 6.                        pos = 6.
Match!