If a motion doesn't move the cursor, move and retry

[cxw42]

E.g.:

• At the end of a word, e is a no-op
• Right before a :, t: is a no-op (and likewise for any single character)

In those cases, move the cursor one space in the correct direction and try the motion again. This is a symptom of the fact that Vi positions the cursor on characters, and Word positions the cursor between characters.