Some whitespace fixes

Didn't change some of the larger testing scripts that use an inconsistent
indentation style.

src/sw-collector/sw_collector_dpkg.c

@@ -98,7 +98,7 @@ METHOD(enumerator_t, enumerator_destroy, void,
 	dpkg_enumerator_t *this)
 {
 	pclose(this->file);
-	free(this);	
+	free(this);
 }
 
 METHOD(sw_collector_dpkg_t, create_sw_enumerator, enumerator_t*,

src/sw-collector/sw_collector_history.h

@@ -55,11 +55,11 @@ struct sw_collector_history_t {
 							  char *buf);
 
 	/**
-	 * Extract packages from event in installation history 
+	 * Extract packages from event in installation history
 	 *
 	 * @param args			Arguments to be processed
 	 * @param eid			Primary key pointing to current event
-	 * @param op			Extraction operation 
+	 * @param op			Extraction operation
 	 * @return				TRUE if extraction succeeded
 	 */
 	bool (*extract_packages)(sw_collector_history_t *this, chunk_t args,

src/sw-collector/sw_collector_rest_api.c

@@ -109,7 +109,7 @@ METHOD(enumerator_t, enumerator_destroy, void,
 	json_array_enumerator_t *this)
 {
 	json_object_put(this->jarray);
-	free(this);	
+	free(this);
 }
 
 METHOD(sw_collector_rest_api_t, create_sw_enumerator, enumerator_t*,