more sizemode/sizeref fixups

Author: etpinard

src/traces/cone/attributes.js

@@ -114,7 +114,7 @@ var attrs = {
         description: [
             'Determines whether `sizeref` is set as a *scaled* (i.e unitless) scalar',
             '(normalized by the max u/v/w norm in the vector field) or as',
-            '*absolute* value (in unit of velocity).'
+            '*absolute* value (in the same units as the vector field).'
         ].join(' ')
     },
     sizeref: {
@@ -126,7 +126,7 @@ var attrs = {
             'Adjusts the cone size scaling.',
             'The size of the cones is determined by their u/v/w norm multiplied a factor and `sizeref`.',
             'This factor (computed internally) corresponds to the minimum "time" to travel across',
-            'two successive x/y/z positions at the average velocity of those two successive positions',
+            'two successive x/y/z positions at the average velocity of those two successive positions.',
             'All cones in a given trace use the same factor.',
             'With `sizemode` set to *scaled*, `sizeref` is unitless, its default value is *0.5*',
             'With `sizemode` set to *absolute*, `sizeref` has the same units as the u/v/w vector field,',