Fix tabulations, trailing spaces, and some long lines.

doc/install.txt

@@ -55,11 +55,14 @@ The following libraries and software are optional:
 
     `nose <http://somethingaboutorange.com/mrl/projects/nose/>`_
         Recommended, to run Theano's test-suite.
+
     `Sphinx <http://sphinx.pocoo.org/>`_ >= 0.5.1, `pygments <http://pygments.org/>`_
         For building the documentation. LaTeX_ and dvipng_ are also necessary
         for math to show up as images.
+
     `Mercurial <http://mercurial.selenic.com/>`_
         To download bleeding-edge versions of Theano.
+
     `NVIDIA CUDA drivers and SDK`_
         Required for GPU code generation/execution. Only NVIDIA GPUs using
         32-bit floating point numbers are currently supported.
@@ -334,8 +337,8 @@ correctly (for example, for MKL this might be ``-lmkl -lguide -lpthread`` or
 Mac
 ---
 
-- If the above required libraries are not already installed on your Mac, one option is first, to
-  install `MacPorts <http://www.macports.org/>`__.
+- If the above required libraries are not already installed on your Mac,
+  one option is first, to install `MacPorts <http://www.macports.org/>`__.
 
 - Then, in order to install one or more of the required libraries, use "port install", e.g. as follows:
 
@@ -421,9 +424,10 @@ Mac
       mac_framework_link=True
 
 Please infom us if you have trouble installing and running Theano on your mac.
-We would be especially interested in dependencies that we missed listing, as well as tests
-that fail on your platform (use the ``theano-users@googlegroups.com`` mailing list,
-but note that you must first register to it, by going to `theano-users`_).
+We would be especially interested in dependencies that we missed
+listing, as well as tests that fail on your platform (use the
+``theano-users@googlegroups.com`` mailing list, but note that you must
+first register to it, by going to `theano-users`_).
 
 
 Windows
@@ -706,7 +710,8 @@ Then
   4) Test some pre-compiled example of the sdk.
 
   5) Download Visual Studio 2008 Express (free, VS2010 not supported by nvcc 3.1,
-     VS2005 is not available for download but supported by nvcc, the non free version should work too).
+     VS2005 is not available for download but supported by nvcc, the non
+     free version should work too).
 
   6) Follow the instruction in the GettingStartedWindows.pdf file from the CUDA web
      site to compile CUDA code with VS2008. If that does not work, you will