Maybe just \linebreak?

Maybe just \linebreak?

@jensmaurer \linebreak doesn't work, because it causes the line to expand to full the entire line between the margins (causing severe underfull). The \hfill gets it to fill the rest of the line with spaces apparently (a trick I found from the \br macro which is only active in lib tables apparently). Seems like this is a question for the Latex experts, @tkoeppe ?

@burblebee A couple quick options to consider (in order of preference):

1. Set \emergencystretch. This value is used by TeX only when typesetting paragraphs with overfull lines and allows TeX to add extra interword space to stretch a line out beyond what the normal line-breaking parameters permit. Note that an overfull line warning may still be logged but the line won't actually be overfull when typeset. This option could be applied globally to the document with minimal impact.
2. Use the sloppypar environment. This employs the \emergencystretch parameter above as well as a few other line-breaking parameters to relax the line-breaking algorithm a bit. Wrap troubleblesome paragraphs in this environment to avoid overfull line warnings altogether. This option should be used only where necessary. Don't use \sloppy globally as it will adversely impact the readability of the document generally.

Finally, if we're running into problems with line-breaking bits of C++ code, we might want to look into better options such as introducing more line break points (e.g., after colons). It might also be worth considering how line-breaking code impacts readability—namely, does the introduction of a hyphen ever cause ambiguity or readability problems?

@burblebee: Just \newline works nicely (it's \hfill + \linebreak)

@jensmaurer @godbyk thanks for the tip guys!

@burblebee: The commit for LWG3077 only seems to modify string, but not deque and vector, as the issue says.