STYLE: Replace Unicode in ITK source with ASCII homoglyphs

Replaced:
'\u2013' -> '-'
'\u00e1' -> 'a'
'\u00ed' -> 'i'
'\ufffd' -> '-' (contextually)

Change-Id: Ia5379160e999efc69ed894d49340d2cdc8367d48
Merge topic 'Remove-Unicode'

213cb97 STYLE: Replace Unicode in ITK source with ASCII homoglyphs