tests: Add some tests for printing floats to improve coverage.

tests/float/string_format.py

@@ -122,6 +122,9 @@ if full_tests:
                             test_fmt('', fill, alignment, sign, '', width, prec, type, num)
                     for num in pct_nums2:
                         test_fmt('', fill, alignment, sign, '', width, '', type, num)
+else:
+    for num in pct_nums1:
+        test_fmt('', '', '', '', '', '', '1', '%', num)
 
 # We don't currently test a type of '' with floats (see the detailed comment
 # in  objstr.c)

tests/float/string_format_modulo.py

@@ -21,3 +21,8 @@ print("%G" % 1.23456)
 print("%06e" % float("inf"))
 print("%06e" % float("-inf"))
 print("%06e" % float("nan"))
+
+print("%02.3d" % 123) # prec > width
+print("%+f %+f" % (1.23, -1.23)) # float sign
+print("% f % f" % (1.23, -1.23)) # float space sign
+print("%0f" % -1.23) # negative number with 0 padding