Add `fmpi_stencil_square()`

include/fmpi_stencil.h

@@ -58,9 +58,9 @@ struct fmpi_stencil fmpi_no_stencil(void);
 ------------------------------------------------------------------------------*/
 struct fmpi_stencil fmpi_stencil_1d(size_t length);
 /*------------------------------------------------------------------------------
-    fmpi_stencil_2d()
+    fmpi_stencil_square()
 ------------------------------------------------------------------------------*/
-struct fmpi_stencil fmpi_stencil_2d(size_t length);
+struct fmpi_stencil fmpi_stencil_square(size_t length);
 /*==============================================================================
     GUARD
 ==============================================================================*/

src/fmpi_stencil.c

@@ -51,9 +51,9 @@ struct fmpi_stencil fmpi_stencil_1d(const size_t length)
     };
 }
 /*------------------------------------------------------------------------------
-    fmpi_stencil_2d()
+    fmpi_stencil_square()
 ------------------------------------------------------------------------------*/
-struct fmpi_stencil fmpi_stencil_2d(const size_t length)
+struct fmpi_stencil fmpi_stencil_square(const size_t length)
 {
     return (struct fmpi_stencil){
         .type = FMPI_STENCIL_SQUARE,