#12688: Improve documentation of span method
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       Reporter:  rbeezer         |         Owner:  jason, was  
           Type:  enhancement     |        Status:  needs_review
       Priority:  minor           |     Milestone:  sage-5.0    
      Component:  linear algebra  |    Resolution:              
       Keywords:  rd2             |   Work issues:              
Report Upstream:  N/A             |     Reviewers:              
        Authors:  Rob Beezer      |     Merged in:              
   Dependencies:  12541           |      Stopgaps:              
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Comment (by novoselt):

 I'll look at it today/tomorrow if nobody beats me.

 A side remark (for probably the next ticket?): while working on #12541 I
 had to fix several pieces of code that looked almost the same. In fact, I
 have removed exactly the same *wrong* lines from six places or so in
 different specializations of free modules. Perhaps these `span` and
 `submodule` methods can be somehow consolidated, e.g. have `span` only in
 the base class which calls `_span` of subclasses for actual work after all
 the typechecking and conversion. Or, if it is really necessary to have
 them everywhere, maybe there can be only 1 or 2 good long docstrings, as
 the one provided by Rob here, and others should just link to it?

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12688#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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