Fixed BigDecimal#to_s 5F formatting issue.

Author: bjfish

CHANGELOG.md

@@ -42,6 +42,7 @@ Bug fixes:
 * Make `Array#concat` work with no or multiple arguments (#1519).
 * Fixed BigDecimal coerce initial argument using `to_str` (#1826).
 * Make `Enumerable#chunk` work without a block (#1518).
+* Fixed `BigDecimal#to_s` formatting issue (#1711).
 
 Compatibility:
 

lib/truffle/bigdecimal.rb

@@ -242,7 +242,7 @@ def to_s(format = 'E')
 
         format '%s%s.%s',
                prefix,
-               add_spaces_to_s(before_dot, true, space_frequency),
+               add_spaces_to_s(before_dot, false, space_frequency),
                add_spaces_to_s(after_dot, false, space_frequency)
       else
         format '%s0.%se%d',

spec/ruby/library/bigdecimal/to_s_spec.rb

@@ -41,6 +41,7 @@
 
     str1 = '-123.45678 90123 45678 9'
     BigDecimal("-123.45678901234567890").to_s('5F').should ==  str1
+    BigDecimal('1000010').to_s('5F').should == "10000 10.0"
     # trailing zeroes removed
     BigDecimal("1.00000000000").to_s('1F').should == "1.0"
     # 0 is treated as no spaces