.editorconfig

run-tests: support multiple cases in .t test

Sometimes we want to run similar tests with slightly different
configurations. Previously we duplicate the test files. This patch
introduces special "#testcases" syntax that allows a single .t file to
contain multiple test cases.

Defined cases could be tested using "#if".

For example, if a test should behave the same with or without an
experimental flag, we can add the following to the .t header:

    #testcases default experimental-a
    #if experimental-a
      $ cat >> $HGRCPATH << EOF
      > [experimental]
      > feature=a
      > EOF
    #endif

The "experimental-a" block won't be executed when running the "default" test
case.

# See http://EditorConfig.org for the specification

root = true

[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true

[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true