[9fans] trailing newline in awk

[dexen deVries <dexen.devries@gmail.com>]

hi list,

can't wrap my head around this: in an awk script, how to take some action if a 
file lacks last trailing Line Feed?

i want to modify files with contents like:
text LF
text LF
text

and leave undisturbed files with content like:
text LF
text LF
text LF

in other words, i want to either:
 - match line that is empty and is last line of file (awk doesn't seem to take 
any action on such line), or, alternatively,
 - match a line that is last line of file and lacks terminating LF.

-- 
dexen deVries

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