; * src/fileio.c (Fsubstitute_in_file_name): Doc fix.
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@ -1830,7 +1830,8 @@ the value of that variable. The variable name should be terminated
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with a character not a letter, digit or underscore; otherwise, enclose
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the entire variable name in braces.
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If FOO is not defined in the environment, it is not substituted.
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If FOO is not defined in the environment, `$FOO' is left unchanged in
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the value of this function.
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If `/~' appears, all of FILENAME through that `/' is discarded.
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If `//' appears, everything up to and including the first of
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