Fix quotes

Author: Greg Bowler

phpunit-action.bash

@@ -22,62 +22,62 @@ fi
 
 if [ -n "$ACTION_LOG_JUNIT" ]
 then
-	command_string+=("--log-junit '$ACTION_LOG_JUNIT'")
+	command_string+=(--log-junit "$ACTION_LOG_JUNIT")
 fi
 
 if [ -n "$ACTION_TESTDOX_HTML" ]
 then
-	command_string+=("--testdox-html '$ACTION_TESTDOX_HTML'")
+	command_string+=(--testdox-html "$ACTION_TESTDOX_HTML")
 fi
 
 if [ -n "$ACTION_TESTDOX_TEXT" ]
 then
-	command_string+=("--testdox-text '$ACTION_TESTDOX_TEXT'")
+	command_string+=(--testdox-text "$ACTION_TESTDOX_TEXT")
 fi
 
 if [ -n "$ACTION_TESTDOX_XML" ]
 then
-	command_string+=("--testdox-xml '$ACTION_TESTDOX_XML'")
+	command_string+=(--testdox-xml "$ACTION_TESTDOX_XML")
 fi
 
 if [ -n "$ACTION_BOOTSTRAP" ]
 then
-	command_string+=("--bootstrap $ACTION_BOOTSTRAP")
+	command_string+=(--bootstrap "$ACTION_BOOTSTRAP")
 fi
 
 if [ -n "$ACTION_FILTER" ]
 then
-	command_string+=("--filter '$ACTION_FILTER'")
+	command_string+=(--filter "$ACTION_FILTER")
 fi
 
 if [ -n "$ACTION_TESTSUITE" ]
 then
-	command_string+=("--testsuite '$ACTION_TESTSUITE'")
+	command_string+=(--testsuite "$ACTION_TESTSUITE")
 fi
 
 if [ -n "$ACTION_GROUP" ]
 then
-	command_string+=("--group '$ACTION_GROUP'")
+	command_string+=(--group "$ACTION_GROUP")
 fi
 
 if [ -n "$ACTION_EXCLUDE_GROUP" ]
 then
-	command_string+=("--exclude-group '$ACTION_EXCLUDE_GROUP'")
+	command_string+=(--exclude-group "$ACTION_EXCLUDE_GROUP")
 fi
 
 if [ -n "$ACTION_TEST_SUFFIX" ]
 then
-	command_string+=("--test-suffix '$ACTION_TEST_SUFFIX'")
+	command_string+=(--test-suffix "$ACTION_TEST_SUFFIX")
 fi
 
 if [ -n "$ACTION_WHITELIST" ]
 then
-	command_string+=("--whitelist '$ACTION_WHITELIST'")
+	command_string+=(--whitelist "$ACTION_WHITELIST")
 fi
 
 if [ -n "$ACTION_MEMORY_LIMIT" ]
 then
-	command_string+=("-d memory_limit=$ACTION_MEMORY_LIMIT")
+	command_string+=(-d memory_limit="$ACTION_MEMORY_LIMIT")
 fi
 
 if [ -n "$ACTION_ARGS" ]