String functions

[ghislainfourny]

Functions left to implement:

codepoints-to-string#1, string-to-codepoints#1, compare#2, compare#3, codepoint-equal#2, string-length#0, string-length#1, normalize-space#0, normalize-space#1, normalize-unicode#1, normalize-unicode#2, upper-case#1, lower-case#1, translate#3, contains#2, substring-before#2, substring-before#3, substring-after#2, substring-after#3

Later (needs collations): ends-with#3 contains#3 starts-with#3

[ghislainfourny]

@CodingKaiser are there any functions from that list that still remain? If so, could we list them for future reference? Thanks!

[ghislainfourny]

@pierremotard Do you think we can now close this issue, or is there any uncovered function?

[pierremotard]

Among these functions, only compare#2 and compare#3 are still uncovered.