X: foo
Y: bar
X append Y: foobar
capitalize_first X: Foo
uncapitalize_first CapX: foo
int_to_string 1234: 1234
octal 1234: 2322
hexadecimal 1234: 4D2
Grouped 1234: 1,234
Grouped 113: 1--1--1--0--0--0--1
Grouped 1300000: 1,300,000
Non Grouped 45999: 45999
string_to_int 5678: 5678
Five f's: fffff
Five f's and five dots: fffff.....
Five dashes, five f's and five dots: -----fffff.....
Five φ's: φφφφφ
Five φ's and five dots: φφφφφ.....
Five dashes, five φ's and five dots: -----φφφφφ.....
aaa|áaȧ|1111111|¹½⅓¼⅕⅙⅛|  1,300,000.00
b  |б  |       |       |      9,999.00
cc |цц |    333|    ¾⅘⅚|123,456,789.99
aaa|áaȧ|1111111|¹½⅓¼⅕⅙⅛|1,300,000.00
b  |б  |     |     |9,999.00
cc |цц |  333|  ¾⅘⅚|123,456,789.99

Wrapped string:
*aaaaaaaaa
aaaaaaaaaa
a* bbbbb
bbb b
ccccc c c
c cccc c c
c c ccccc
ccc cccc c
ccc ccc
ccc
*ddddddddd
dddddddddd
dddddddddd
dddddddddd
dddddddddd
ddddd* eee
Wrapped string with hyphens:
*aaaaaaaa-
aaaaaaaaa-
aaa* bbbbb
bbb b
ccccc c c
c cccc c c
c c ccccc
ccc cccc c
ccc ccc
ccc
*dddddddd-
ddddddddd-
ddddddddd-
ddddddddd-
ddddddddd-
ddddddddd-
d* eee
Wrapped string with dots:
*a...
aa...
aa...
a*
bbbbb
bbb b
ccccc
c c c
cccc
c c c
c
ccccc
ccc
cccc
c ccc
ccc
ccc
*d...
dd...
dd...
dd...
dd...
dd...
dd...
d*
eee
Wrapped string where separator is too long:
wh
at
ev
er