updates

Author: mohanchen

docs/advanced/input_files/input-main.md

@@ -1670,7 +1670,7 @@ These variables are used to control the output of properties.
   - 1: (txt format) 
     - non-gamma-only: `wfs1k1_pw.txt` or `wfs1k2_pw.txt`, ...;
   - 2: (binary format)
-    - non-gamma-only: `wfs1k1_pw.dat` or `wfs1k2_Pw.dat`, ....
+    - non-gamma-only: `wfs1k1_pw.dat` or `wfs1k2_pw.dat`, ....
 - **Default**: 0
 
 ### out_wfc_r

source/module_io/filename.cpp

@@ -41,13 +41,13 @@ std::string filename_output(
 
 	// spin index
 	int is0 = -1;
-	// ik0 is the k-point index, starting from 1
+	// ik0 is the k-point index, starting from 0
 	int ik0 = ik2iktot[ik_local];
 
-    if(nspin == 1)
-    {
-        is0 = 1;
-    }
+	if(nspin == 1)
+	{
+		is0 = 1;
+	}
 	else if(nspin == 2)
 	{
 		const int half_k = nkstot/2;
@@ -60,14 +60,14 @@ std::string filename_output(
 		{
 			is0 = 1;
 		}
-    }
-    else if(nspin==4)
-    {
-        is0 = 12;
-    }
+	}
+	else if(nspin==4)
+	{
+		is0 = 12;
+	}
 
-    // spin part
-    std::string spin_block;
+	// spin part
+	std::string spin_block;
     spin_block = "s" + std::to_string(is0);
 
     // k-point part