Fix to output of scientific notation for real interval field

[tscrim]

Currently if you set scientific notation for the real interval field, it does not print in scientific notation.

sage: RIF.scientific_notation(True)
sage: RIF(0.025)
0.025000000000000002?
sage: RIF.scientific_notation()
True
sage: RIF(0.025)
0.025000000000000002?
sage: RIF(0.025).str(no_sci=False)
'2.5000000000000002?e-2'

This is caused by not checking when no_sci option is None (and then checking the parent). After patch:

sage: RIF(0.025)
0.025000000000000002?
sage: RIF.scientific_notation(True)
sage: RIF(0.025)
2.5000000000000002?e-2

Component: misc

Keywords: real interval field

Author: Travis Scrimshaw

Reviewer: Robert Bradshaw

Merged: sage-5.5.beta1

Issue created by migration from https://trac.sagemath.org/ticket/13634

[tscrim]

comment:1

Please review.

[tscrim]

Description changed:

--- 
+++ 
@@ -6,6 +6,8 @@
 0.025000000000000002?
 sage: RIF.scientific_notation()
 True
+sage: RIF(0.025)
+0.025000000000000002?
 sage: RIF(0.025).str(no_sci=False)
 '2.5000000000000002?e-2'
 ```

[robertwb]

comment:3

Minor nit: I'd prefere "not no_sci" to "no_sci == False" in case the user passes a value like 0. But other than that, looks good (including the nice docstring cleanups).

[robertwb]

Reviewer: Robert Bradshaw

[tscrim]

comment:5

Attachment: trac_13634-RIF_sci_notation_fix-ts.patch.gz

Changed. Thank you.

[jdemeyer]

Merged: sage-5.5.beta1