use existing number formatter

Author: Tieske

spec/extra/errors/collect_all_errors.json

@@ -145,7 +145,7 @@
                 "valid": false,
                 "error_entries": [
                     {"schema_path": "/minimum", "instance_path": "", "error": "expected 7 to be greater than 10"},
-                    {"schema_path": "/multipleOf", "instance_path": "", "error": "expected 7.0 to be a multiple of 5.0"}
+                    {"schema_path": "/multipleOf", "instance_path": "", "error": "expected 7 to be a multiple of 5"}
                 ]
             }
         ]

src/resty/ljsonschema/init.lua

@@ -800,12 +800,12 @@ generate_validator = function(ctx, schema)
       ctx:stmt(sformat(  '  local itemcount = #%s', ctx:param(1)))
       if schema.minItems then
         ctx:stmt(sformat('  if itemcount < %d then', schema.minItems))
-        ctx:handle_error('    ', sformat('"expect array to have at least %s items"', math.floor(schema.minItems)), '"/minItems"', '""')
+        ctx:handle_error('    ', sformat('"expect array to have at least %s items"', format_number(schema.minItems)), '"/minItems"', '""')
         ctx:stmt(        '  end')
       end
       if schema.maxItems then
         ctx:stmt(sformat('  if itemcount > %d then', schema.maxItems))
-        ctx:handle_error('    ', sformat('"expect array to have at most %s items"', math.floor(schema.maxItems)), '"/maxItems"', '""')
+        ctx:handle_error('    ', sformat('"expect array to have at most %s items"', format_number(schema.maxItems)), '"/maxItems"', '""')
         ctx:stmt(        '  end')
       end
     end
@@ -1052,7 +1052,7 @@ generate_validator = function(ctx, schema)
         ctx:stmt(sformat('  if %s(quotient) ~= quotient or %s == quotient or %s == -quotient then', ctx:libfunc('math.modf'), ctx:libfunc('math.huge'), ctx:libfunc('math.huge')))
       end
       ctx:handle_error('    ', sformat('%s("expected %%s to be a multiple of %s", %s)',
-                       ctx:libfunc('string.format'), mof, ctx:param(1)), '"/multipleOf"', '""')
+                       ctx:libfunc('string.format'), format_number(mof), format_number(ctx:param(1))), '"/multipleOf"', '""')
       ctx:stmt(          '  end')
     end
     ctx:stmt('end') -- if number