viper-smart-suffix-list

viper-smart-suffix-list is a variable defined in `viper-cmd.el'.
Its value is

("" "tex" "c" "cc" "C" "java" "el" "html" "htm" "xml" "pl" "flr" "P" "p" "h" "H")

Documentation:
List of suffixes that Viper tries to append to filenames ending with a `.'.
This is useful when the current directory contains files with the same
prefix and many different suffixes. Usually, only one of the suffixes
represents an editable file. However, file completion will stop at the `.'
The smart suffix feature lets you hit RET in such a case, and Viper will
select the appropriate suffix.

Suffixes are tried in the order given and the first suffix for which a
corresponding file exists is selected. If no file exists for any of the
suffixes, the user is asked to confirm.

To turn this feature off, set this variable to nil.

You can customize this variable.