src/std/string.d

465         startIdx = starting index to a well-formed code point
479         formed codepoint, then a $(REF UTFException, std,utf) may be thrown.
923         formed codepoint, then a $(REF UTFException, std,utf) may be thrown.
1173         formed codepoint, then a $(REF UTFException, std,utf) may be thrown.
1362         formed codepoint, then a $(REF UTFException, std,utf) may be thrown.
1755     does not represent a well formed codepoint, then a $(REF UTFException, std,utf)
1922     represent a well formed codepoint, then a $(REF UTFException, std,utf) may be
6818  * The input text string s is formed into a paragraph
7179 /** Assume the given array of integers `arr` is a well-formed UTF string and
7195     In debug mode `AssertError`, when the result is not a well-formed UTF string.