Rework eslint invocation to avoid needless warnings
Rework eslint invocation to avoid needless warnings

Specifying exact directories in which one or more files are found to be
excluded by the special `.eslintignore` directives file causes eslint to
produce a warning per exclusion.  However, if one specifies `.` as the path to
process - as opposed to specific directories/files - eslint does not produce
any warnings about excluded files.

dossier/html-highlighter,dossier/html-highlighter,dossier/html-highlighter