run-tests: rename `lcmd` variable to `line_cmd`
This is clearer and more in line with some other variable names.
(This is a gratuitous cleanup that I made while investigating a bug).
# 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
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false