fixup doTicks docstring

Author: etpinard

src/plots/cartesian/axes.js

@@ -1500,7 +1500,8 @@ axes.makeClipPaths = function(gd) {
     });
 };
 
-/** Main multi-axis drawing routine!
+/**
+ * Main multi-axis drawing routine!
  *
  * @param {DOM element} gd : graph div
  * @param {string or array of strings} arg : polymorphic argument
@@ -1556,14 +1557,15 @@ axes.doTicks = function(gd, arg, skipTitle) {
     }));
 };
 
-/** Per axis drawing routine!
+/**
+ * Per-axis drawing routine!
  *
  * This routine draws axis ticks and much more (... grids, labels, title etc.)
  * Supports multiple argument signatures.
  * N.B. this thing is async in general (because of MathJax rendering)
  *
  * @param {DOM element} gd : graph div
- * @param {string or array of strings} arg : polymorphic argument
+ * @param {string or object} arg : polymorphic argument
  * @param {boolean} skipTitle : optional flag to skip axis title draw/update
  * @return {promise}
  *