Consider m_sign when calculating precision

Together with the last commit this fixes the loss of precision when handling floats in scientic notation.

1 files changed, 1 insertions, 1 deletions

diff --git a/representer.py b/representer.py
index 9163637..fddfa3c 100644
--- a/representer.py
+++ b/representer.py
@@ -782,7 +782,7 @@ class RoundTripRepresenter(SafeRepresenter):
                 value += u'0'
         else:
             # exponent
-            m, es = u'{:{}.{}e}'.format(data, data._width, data._width - data._prec).split('e')
+            m, es = u'{:{}.{}e}'.format(data, data._width, data._width - data._prec + (1 if data._m_sign else 0)).split('e')
             w = data._width if data._prec > 0 else (data._width + 1)
             if data < 0:
                 w += 1