Fix up duplicated duplicated words in comments

Like in r10-7215-g700d4cb08c88aec37c13e21e63dd61fd698baabc 2 years ago,
I've run
grep -v 'long long\|optab optab\|template template\|double double' *.{[chS],cc} */*.{[chS],cc} *.def config/*/* 2>/dev/null | grep ' \([a-zA-Z]\+\) \1 '
and for the cases that looked clearly wrong changed them, mostly by removing
one of the duplicated words but in some cases with other changes.

2022-03-07  Jakub Jelinek  <jakub@redhat.com>

gcc/
	* tree-ssa-propagate.cc: Fix up duplicated word issue in a comment.
	* config/riscv/riscv.cc: Likewise.
	* config/darwin.h: Likewise.
	* config/i386/i386.cc: Likewise.
	* config/aarch64/thunderx3t110.md: Likewise.
	* config/aarch64/fractional-cost.h: Likewise.
	* config/vax/vax.cc: Likewise.
	* config/rs6000/pcrel-opt.md: Likewise.
	* config/rs6000/predicates.md: Likewise.
	* ctfc.h: Likewise.
	* tree-ssa-uninit.cc: Likewise.
	* value-relation.h: Likewise.
	* gimple-range-gori.cc: Likewise.
	* ipa-polymorphic-call.cc: Likewise.
	* pointer-query.cc: Likewise.
	* ipa-sra.cc: Likewise.
	* internal-fn.cc: Likewise.
	* varasm.cc: Likewise.
	* gimple-ssa-warn-access.cc: Likewise.
gcc/analyzer/
	* store.cc: Fix up duplicated word issue in a comment.
	* analyzer.cc: Likewise.
	* engine.cc: Likewise.
	* sm-taint.cc: Likewise.
gcc/c-family/
	* c-attribs.cc: Fix up duplicated word issue in a comment.
gcc/cp/
	* cvt.cc: Fix up duplicated word issue in a comment.
	* pt.cc: Likewise.
	* module.cc: Likewise.
	* coroutines.cc: Likewise.
gcc/fortran/
	* trans-expr.cc: Fix up duplicated word issue in a comment.
	* gfortran.h: Likewise.
	* scanner.cc: Likewise.
gcc/jit/
	* libgccjit.h: Fix up duplicated word issue in a comment.