title: Textscan skips desired white space at begin of line
body: <p>To run a certain software I'm using <code>.txt</code>-input files which I need to manipulate with Matlab.
  I know how to do it, and I didn't expected problems. As it was not working I reduced my manipulation script to a minimum, so actually nothing is changed. Except some white spaces, and the other software seems to react very sensitive on that.</p>
  
  <p>parts of my file look like that:</p>
  
  <pre><code>...
  *CONTROL_TERMINATION
  $#  endtim    endcyc     dtmin    endeng    endmas
    1.000000         0     0.000     0.000     0.000
  *CONTROL_TIMESTEP
  $#  dtinit    tssfac      isdo    tslimt     dt2ms      lctm     erode     ms1st
       0.000  0.900000         0     0.000 -1.000E-4         0         0         0
  $#  dt2msf   dt2mslc     imscl
       0.000         0         0
  ...
  </code></pre>
  
  <p>I'm loading it to Matlab and directly save it again without changes:</p>
  
  <pre><code>% read original file
  fid = fopen('filename.txt','r');
  param = textscan(fid,'%s','delimiter','\n');
  rows = param{1,1};
  fclose(fid);
  
  % overwrite to new file
  fid = fopen('filename.txt','w');
  fprintf(fid, '%s\r\n', rows{:});
  fclose(fid);
  </code></pre>
  
  <p>The output file is lacking of the white spaces at the begin of every line, that seems to be the only difference of input and output file. (at least I hope so)</p>
  
  <pre><code>...
  *CONTROL_TERMINATION
  $#  endtim    endcyc     dtmin    endeng    endmas
  1.000000         0     0.000     0.000     0.000
  *CONTROL_TIMESTEP
  $#  dtinit    tssfac      isdo    tslimt     dt2ms      lctm     erode     ms1st
  0.000  0.900000         0     0.000 -1.000E-4         0         0         0
  $#  dt2msf   dt2mslc     imscl
  0.000         0         0
  ...
  </code></pre>
  
  <p>Though it seems weird to me, that this should be the reason - what can I change, that both files look 100% identical? The problem I'm having is that the white spaces have different lengths.</p>