change varExp name

tools/FROGS_phyloseq_stats/FROGS_phyloseq_stats.rule.snakefile

-    rule <step_name>__FROGS_phyloseq_stats:
+rule <step_name>__FROGS_phyloseq_stats:
         input:
             **<step_name>__FROGS_phyloseq_stats_inputs(),
         output:
@@ -7,8 +7,8 @@
         log: config["results_dir"]+'/logs/' + config["<step_name>__FROGS_phyloseq_stats_output_dir"] + '/FROGS_phyloseq_stats_log.txt',
         params:
             command = config["<step_name>__FROGS_phyloseq_stats_command"],
-            outDir = config["results_dir"]+'/'+config["<step_name>__FROGS_phyloseq_stats_output_dir"],
-            varExp = config["<step_name>__FROGS_phyloseq_stats_varExp"],
+            outDir  = config["results_dir"]+'/'+config["<step_name>__FROGS_phyloseq_stats_output_dir"],
+            varExp  = config["<step_name>__FROGS_phyloseq_stats_varExp"],
             stepDir = config["<step_name>__FROGS_phyloseq_stats_output_dir"],
 
         shell: """