CI/Circle CI: Show codestyle instructions

Show a short comment about how to fix the codestyle errors

contrib/check_codestyle.sh

@@ -4,28 +4,34 @@ set -e
 echo "Codestyle check script:"
 echo
 
-singleLineRegexChecks=(
-    "TC_LOG_.+GetCounter"
-    "[[:blank:]]$"
-    "\t"
+declare -A singleLineRegexChecks=(
+    ["TC_LOG_.+GetCounter"]="Use ObjectGuid::ToString().c_str() method instead of ObjectGuid::GetCounter() when logging. Check the lines above"
+    ["[[:blank:]]$"]="Remove whitespace at the end of the lines above"
+    ["\t"]="Replace tabs with 4 spaces in the lines above"
 )
-for check in ${singleLineRegexChecks[@]}; do
+for check in ${!singleLineRegexChecks[@]}; do
     echo "  Checking RegEx: '${check}'"
     
     if grep -P -r -I -n ${check} src; then
+        echo
+        echo "${singleLineRegexChecks[$check]}"
         exit 1
     fi
 done
 
-multiLineRegexChecks=(
-    "TC_LOG_[^;]+GetCounter"
+declare -A multiLineRegexChecks=(
+    ["TC_LOG_[^;]+GetCounter"]="Use ObjectGuid::ToString().c_str() method instead of ObjectGuid::GetCounter() when logging. Check the lines above"
 )
-for check in ${multiLineRegexChecks[@]}; do
+for check in ${!multiLineRegexChecks[@]}; do
     echo "  Checking RegEx: '${check}'"
     
     if grep -Pzo -r -I ${check} src; then
+        echo
+        echo
+        echo "${multiLineRegexChecks[$check]}"
         exit 1
     fi
 done
 
+echo
 echo "Everything looks good"