py: Fix regress for printing of floats and #if.

Also change formating modifier in test script (it still passes with
original format though).

py/objstr.c

@@ -788,9 +788,9 @@ mp_obj_t str_format(uint n_args, const mp_obj_t *args) {
                     nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
                         "Unknown format code '%c' for object of type '%s'", type, mp_obj_get_type_str(arg)));
             }
+        }
 
-#if MICROPY_ENABLE_FLOAT
-        } else if (arg_looks_numeric(arg)) {
+        if (arg_looks_numeric(arg)) {
             if (!type) {
 
                 // Even though the docs say that an unspecified type is the same
@@ -828,6 +828,7 @@ mp_obj_t str_format(uint n_args, const mp_obj_t *args) {
 
             flags |= PF_FLAG_PAD_NAN_INF; // '{:06e}'.format(float('-inf')) should give '-00inf'
             switch (type) {
+#if MICROPY_ENABLE_FLOAT
                 case 'e':
                 case 'E':
                 case 'f':
@@ -841,14 +842,13 @@ mp_obj_t str_format(uint n_args, const mp_obj_t *args) {
                     flags |= PF_FLAG_ADD_PERCENT;
                     pfenv_print_float(&pfenv_vstr, mp_obj_get_float(arg) * 100.0F, 'f', flags, fill, width, precision);
                     break;
+#endif
 
                 default:
                     nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
                         "Unknown format code '%c' for object of type 'float'",
                         type, mp_obj_get_type_str(arg)));
             }
-#endif
-
         } else {
             // arg doesn't look like a number
 

tests/basics/math-fun.py

@@ -34,7 +34,7 @@ functions = [('sqrt', sqrt, p_test_values),
 for function_name, function, test_vals in functions:
     print(function_name)
     for value in test_vals:
-        print("{:8.7g}".format(function(value)))
+        print("{:.7g}".format(function(value)))
 
 binary_functions = [('copysign', copysign, [(23., 42.), (-23., 42.), (23., -42.),
                                 (-23., -42.), (1., 0.0), (1., -0.0)])
@@ -43,4 +43,4 @@ binary_functions = [('copysign', copysign, [(23., 42.), (-23., 42.), (23., -42.)
 for function_name, function, test_vals in binary_functions:
     print(function_name)
     for value1, value2 in test_vals:
-        print("{:8.7g}".format(function(value1, value2)))
+        print("{:.7g}".format(function(value1, value2)))