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bug#14710: add-file-local-variable vs. unquoted string

From: Juri Linkov
Subject: bug#14710: add-file-local-variable vs. unquoted string
Date: Tue, 25 Jun 2013 02:40:40 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (x86_64-pc-linux-gnu)

> Try
> M-x add-file-local-variable
> compile-command
> a b c
> Note how b c are thrown away.

That's because `add-file-local-variable' takes care about writing
only correct values that could be read later without errors.

> Yes the user should have typed "a b c",
> but still some warning should be printed upon throwing them away.

I have no idea how such a warning could be produced, and even
if we will found a way to detect the situation when it should be
displayed, you won't see it anyway because it will be instantaneously
overwritten in the echo area by another recently added message:
"For this change to take effect revisit file using `revert-buffer'".

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