tests: remove unnecessary single quotes in perl hash use: ->{'SYM'}

Run this command:
  git grep -l "limits->{'" \
    | xargs perl -pi -e "s/limits->{'(.*?)'}/limits->{\$1}/g"
* cfg.mk (sc_prohibit_perl_hash_quotes): New rule to match.
* tests/misc/join: Remove quotes.
* tests/misc/sort: Likewise.
* tests/misc/sort-merge: Likewise.
* tests/misc/test: Likewise.
* tests/misc/unexpand: Likewise.
* tests/misc/uniq: Likewise.

1 files changed, 5 insertions, 0 deletions

diff --git a/cfg.mk b/cfg.mk
index ae05f8c52..dff5de5d9 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -233,6 +233,11 @@ sc_require_stdio_safer:
 	else :;								\
 	fi
 
+sc_prohibit_perl_hash_quotes:
+	@prohibit="\{'[A-Z_]+' *[=}]"					\
+	halt="in Perl code, write \$$hash{KEY}, not \$$hash{'K''EY'}"	\
+	  $(_sc_search_regexp)
+
 # Prefer xnanosleep over other less-precise sleep methods
 sc_prohibit_sleep:
 	@prohibit='\<(nano|u)?sleep \('					\