Hmisc was updated yesterday
Auto substitution a file extention accordingly the dev chunk option
Merge pull request #26 from unikum/patch-1

Auto substitution a file extention accordingly the dev chunk option
Revert "Auto substitution a file extention accordingly the dev chunk option"

This reverts commit bc37861adb13556364ea82ef0e7a5e9dcc286534.
Merge remote-tracking branch 'yihui/master' into 666-kable-booktabs