I am facing a very annoying problem with mathematica file. Sometimes it is automatically saved in a "pdf like" bizarre format. Each input and output line of the original (.nb) file starts with In[#] and Out[#] respectively. Here is how it looks.
I can not transform into usual input type format. I have to re-type the whole file again! :( I've no idea what's going on here.
Here is the link to the file : https://www.dropbox.com/s/b71d14rlkf9vcx4/scalar-w4.nb?dl=0
Info : I use mathematica 10.0 and I just realized this is happening in my desktop which is debian 7.8 (64 bit). But it also happens in my laptop (ubuntu 14.04) if I try to modify that file.