brian-team/brian2 — pull request #362 by mstimberg (2014-11-05 16:23:32+00:00)
Title: Fix (and test) the sympy rendering of small values. Fixes #361

This should fix the issue.
```Python
>>> SympyNodeRenderer().render_expr("1.50000000e-10")
'Float(1.5e-10)'
```