fix: correct internal spelling typos

- BC_SlIP_WALL → BC_SLIP_WALL (lowercase 'l' typo, Fortran is
  case-insensitive so it compiled, but grep missed this site)
- lb → lB (lowercase 'l' vs uppercase 'B' consistency in
  m_finite_differences.fpp allocate)
- fite_path_dest → file_path_dest (typo in variable name)

Fixes #1498 (partial — items 2, 4, 5).

Author: lb1192176991-lab

src/common/m_boundary_common.fpp

@@ -260,7 +260,7 @@ contains
                             call s_symmetry(q_prim_vf, 3, 1, k, l, pb_in, mv_in, q_T_sf)
                         case (BC_PERIODIC)
                             call s_periodic(q_prim_vf, 3, 1, k, l, pb_in, mv_in, q_T_sf)
-                        case (BC_SlIP_WALL)
+                        case (BC_SLIP_WALL)
                             call s_slip_wall(q_prim_vf, 3, 1, k, l, q_T_sf)
                         case (BC_NO_SLIP_WALL)
                             call s_no_slip_wall(q_prim_vf, 3, 1, k, l, q_T_sf)

src/common/m_finite_differences.fpp

@@ -39,7 +39,7 @@ contains
 
 #ifdef MFC_POST_PROCESS
         if (allocated(fd_coeff_s)) deallocate (fd_coeff_s)
-        allocate (fd_coeff_s(-fd_number_in:fd_number_in,lb:lE))
+        allocate (fd_coeff_s(-fd_number_in:fd_number_in,lB:lE))
 #endif
 
         ! Computing the 1st order finite-difference coefficients

toolchain/mfc/test/case.py

@@ -479,9 +479,9 @@ def create_input_lagrange(path_test):
 
 def copy_input_lagrange(path_example_input, path_test):
     folder_path_dest = path_test + "/input/"
-    fite_path_dest = folder_path_dest + "lag_bubbles.dat"
+    file_path_dest = folder_path_dest + "lag_bubbles.dat"
     file_path_src = common.MFC_EXAMPLE_DIRPATH + path_example_input + "/input/lag_bubbles.dat"
     if not os.path.exists(folder_path_dest):
         os.mkdir(folder_path_dest)
 
-    shutil.copyfile(file_path_src, fite_path_dest)
+    shutil.copyfile(file_path_src, file_path_dest)