.rubocop.yml in newrelic_rpm-9.0.0 vs .rubocop.yml in newrelic_rpm-9.1.0

@@ -64,11 +64,11 @@
   Enabled: true
 Style/RedundantEach: # new in 1.38
   Enabled: true
 Style/RedundantInitialize: # new in 1.27
   Enabled: true
-Style/RedundantStringEscape: # new in 1.37
+Style/RedundantStringEscape: # new in 1.37, 'pending' by default so enabled to make sure it's applied
   Enabled: true
 Style/YodaExpression: # new in 1.42
   Enabled: true
 Minitest/AssertKindOf: # new in 0.10
   Enabled: true
@@ -138,12 +138,13 @@
   Enabled: true
 Performance/StringIdentifierArgument: # new in 1.13
   Enabled: true
 Performance/StringInclude: # new in 1.7
   Enabled: true
+Performance/Sum: # new in 1.8, pending so left enabled explicitly until 2.0
+  Enabled: true
 
-
 # Old cops
 
 Bundler/DuplicatedGem:
   Enabled: true
   Include:
@@ -1253,13 +1254,10 @@
   Enabled: false
 
 Style/DoubleCopDisableDirective:
   Enabled: false
 
-Style/DoubleNegation:
-  Enabled: false
-
 Style/EachForSimpleLoop:
   Enabled: true
 
 # Disabling for now
 Style/EachWithObject:
@@ -1316,10 +1314,13 @@
   Enabled: false
 
 Style/ExponentialNotation:
   Enabled: false
 
+Style/FetchEnvVar:
+  Enabled: false
+
 Style/FloatDivision:
   Enabled: false
 
 # Disabling for now
 Style/For:
@@ -1778,20 +1779,9 @@
 Style/StringConcatenation:
   Enabled: false
 
 Style/StringHashKeys:
   Enabled: false
-
-# Disabling for now
-Style/StringLiterals:
-  Enabled: false
-#   EnforcedStyle: double_quotes
-#   ConsistentQuotesInMultiline: false
-
-# Disabling for now
-Style/StringLiteralsInInterpolation:
-  Enabled: false
-  # EnforcedStyle: double_quotes
 
 Style/StringMethods:
   Enabled: false
 
 Style/Strip: