# Line break at hyphen in source inserts space in output

I prefer to wrap lines in my LaTeX source, and my editor will often choose a hyphen as a good place to split the line. Unfortunately, if a hyphenated word doesn't appear in the output file at a line break, then LaTeX will insert a space immediately after the hyphen.

I'm looking for a way to train my editor not to break there. Alternatively, is there a way I can tell LaTeX not to insert a space at a line break if the line ends in a hyphen?

• Train? hmmmmmmmm interesting :-) – azetina Nov 15 '13 at 19:11
• Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. – karlkoeller Nov 15 '13 at 19:30
• have you tried with a percent sign % after the hyphen as in text-%[line break in source]text[on next line]? – user4686 Nov 16 '13 at 9:26
• Change editor; if it breaks lines at hyphens it has no use for anything. – egreg Nov 16 '13 at 10:48
• @jfbu a % at the end of the line produces the exact behavior I'm looking for, and seems safe enough for a find-all / replace. Ideally, I'd like to find a "reflow safe" solution (akin to the solution from karlkoeller below) but this is great for now. – user41103 Nov 18 '13 at 16:53

Try this code

\documentclass{article}

\def\myhyphen{-}
\catcode-=\active
\def-{\myhyphen\ignorespaces}

\begin{document}
text text text text text text text text text text text text text-
text text text text text text text text text text text text text
\end{document}


Output:

• this works "too well". if your text includes the phrase "sub- and superscripts", the "necessary" space would be gobbled. the %` approach is (unfortunately) more reliable. – barbara beeton Nov 16 '13 at 18:47
• @barbarabeeton I know... But I don't know how to check whether the hyphen is last character in the line. – karlkoeller Nov 16 '13 at 19:08