reformat function usage

docs/source/tutorial.rst

@@ -173,14 +173,14 @@ Recommended methods
 
 These methods are most commonly used in drilling operations and are recommended for most cases:
 
-- ``wp.mininum_curvature`` **minimum curvature method**
+- **minimum curvature method** : ``wp.mininum_curvature``
     This method uses angles from upper and lower end of survey interval to
     calculate a curve that passes through both survey points.
     This curve is
     smoothed by use of the ratio factor defined by the tortuosity or dogleg
     of the wellpath.
     This method returns a dogleg severity calculated for a given course_length.
-- ``wp.radius_curvature`` **radius of curvature method**
+- **radius of curvature method** : ``wp.radius_curvature``
     Calculate TVD using radius or curvature method.
     **Caution**: this will yield unreliable results when data are closely spaced
     or when the borehole is straight but deviated.
@@ -192,12 +192,12 @@ Comparison methods
 
 These methods might be used for comparison to the recommended methods:
 
-- ``wp.average_tan`` **average tan method**
+- **average tan method** : ``wp.average_tan``
     Calculate TVD using average tangential method.
     This method averages the inclination and azimuth at the top and
     bottom of the survey interval before taking their sine and cosine,
     this average angle is used to estimate tvd.
-- ``wp.balanced_tan`` **balanced tan method**
+- **balanced tan method** : ``wp.balanced_tan``
     Calculate TVD using balanced tangential method.
     This method takes the sines and cosines of the inclination and azimuth
     at the top and bottom of the survey interval before averaging them,
@@ -210,13 +210,13 @@ Not recommended methods
 
 These methods are provided for completeness and in case a comparison must be made to an existing survey using these methods, but they are *not recommended*:
 
-- ``wp.high_tan`` **high tan method**
+- **high tan method** : ``wp.high_tan``
     Calculate TVD using high tangential method.
     This method takes the sines and cosines of the inclination and azimuth
     at the bottom of the survey interval to estimate tvd.
     This method is **not recommended** as it can make gross tvd and offset
     errors in typical deviated wells.
-- ``wp.low_tan`` **low tan method**
+- **low tan method** : ``wp.low_tan``
     Calculate TVD using low tangential method.
     This method takes the sines and cosines of the inclination and azimuth
     at the top of the survey interval to estimate tvd.