This minor clean-up patch tweaks arc.md to use whitespace consistently
in output templates, always using a TAB between the mnemonic and its
operands, and avoiding spaces after commas between operands.  There
should be no functional changes with this patch, though several test
cases' scan-assembler needed to be updated to use \s+ instead of testing
for a TAB or a space explicitly.

Tested with a cross-compiler to arc-linux hosted on x86_64,
with no new (compile-only) regressions from make -k check.
Ok for mainline if this passes Claudiu's nightly testing?


2023-11-06  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog
        * config/arc/arc.md: Make output template whitespace consistent.

gcc/testsuite/ChangeLog
        * gcc.target/arc/jli-1.c: Update dg-final whitespace.
        * gcc.target/arc/jli-2.c: Likewise.
        * gcc.target/arc/naked-1.c: Likewise.
        * gcc.target/arc/naked-2.c: Likewise.
        * gcc.target/arc/tmac-1.c: Likewise.
        * gcc.target/arc/tmac-2.c: Likewise.


Thanks again,
Roger
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