Merge pull request #187 from aglowacki/master

minor update to documentation for custom optimizer presets

docs/custom_optimizer_presets.md

@@ -12,30 +12,37 @@ Note that 0 means user specified custom preset from the override file
 For each fit parameter you can add the following 
 
 fit_param_name + the following
-
+```
 fit_param_name + _MIN
 fit_param_name + _MAX
 fit_param_name + _STEPSIZE
 fit_param_name + _FITTING
+```
 
 ### _FITTING
+```
 fixed : do not fit this parameters
 limit_lo_hi : If using mpfit, limit to the _MIN and _MAX ranges
 limit_lo : If using mpfit, limit to the _MIN range
 limit_hi : If using mpfit, limit to the _MAX range
 fit : Fit this parameters with out an constraints.
+```
 
 ### Example 
-#### Energy offset fit it with limits 
+#### Energy offset fit it with limits
+``` 
 CAL_OFFSET_[E_OFFSET]:           -0.0054764490
 CAL_OFFSET_[E_OFFSET]_MAX:        0.50000000
 CAL_OFFSET_[E_OFFSET]_MIN:        -0.50000000
 CAL_OFFSET_[E_OFFSET]_STEPSIZE:   0.001
 CAL_OFFSET_[E_OFFSET]_FITTING:    limit_lo_hi
+```
 
 #### F_TAIL_OFFSET set limits but don't use them since we set FITTING to fit, will use step size if calling mpfit
+```
 F_TAIL_OFFSET:        0.003
 F_TAIL_OFFSET_MAX:    0.100
 F_TAIL_OFFSET_MIN:    0.00001
 F_TAIL_OFFSET_STEPSIZE:    0.00001
 F_TAIL_OFFSET_FITTING:    fit
+```