Taco Hoekwater wrote:

Hi,

Macros that use \doifnextcharelse should all be defined as \unexpanded, to prevent errors like:

\expanded{$\sqrt 2$}

Also affected are:

\decrement \increment

maybe there are others, but these were easy to spot because they were single-line \def's. The \sqrt is painful, because it is likely to appear in \write-s

i ran into that yesterday and made it unexpanded; this problem was introduced when (on user request) sqrt got the optional arg and thereby was no longer defined as math thingie with automatic protection. Hans