[SCM] make branch, master, updated. 4.3-57-gc5319e7

[Paul D. Smith]

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- Log -----------------------------------------------------------------
commit c5319e75f5b64c972a38967a6eb5747838e914fd
Author: Paul Smith <psmith@gnu.org>
Date:   Mon Mar 15 03:28:11 2021 -0400

    [SV 58497] Ensure $(file <) newline removal succeeds
    
    Keep a count of bytes read rather than comparing pointers since the
    variable_buffer might get reallocated.
    
    Bug and patch by Ken Tossell <ken@tossell.net>
    Regression tests by Dmitry Goncharov <dgoncharov@users.sf.net>
    Tweaked by Paul Smith <psmith@gnu.org>
    
    * src/function.c (func_file): Use bytes read rather than a pointer.
    * tests/scripts/functions/file: Provide various tests for reading
    empty files, files with/without newlines, and large files.

-----------------------------------------------------------------------

Summary of changes:
 src/function.c               | 13 ++++----
 tests/scripts/functions/file | 70 ++++++++++++++++++++++++++++++++++++++++++++
 tests/thelp.pl               |  7 ++++-
 3 files changed, 83 insertions(+), 7 deletions(-)


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