minor formatting fixes to make better Markdown

Author: gvwilson

src/components/annotations/attributes.js

@@ -49,9 +49,9 @@ module.exports = templatedArray('annotation', {
         description: [
             'Sets the text associated with this annotation.',
             'Plotly uses a subset of HTML tags to do things like',
-            'newline (<br>), bold (<b></b>), italics (<i></i>),',
-            'hyperlinks (<a href=\'...\'></a>). Tags <em>, <sup>, <sub>, <s>, <u>',
-            '<span> are also supported.'
+            'newline (`<br>`), bold (`<b></b>`), italics (`<i></i>`),',
+            'hyperlinks (`<a href=\'...\'></a>`). Tags `<em>`, `<sup>`,',
+            '`<sub>`, `<s>`, `<u>`, and `<span>` are also supported.'
         ].join(' ')
     },
     textangle: {

src/components/errorbars/attributes.js

@@ -16,7 +16,7 @@ module.exports = {
         description: [
             'Determines the rule used to generate the error bars.',
 
-            'If *constant`, the bar lengths are of a constant value.',
+            'If *constant*, the bar lengths are of a constant value.',
             'Set this constant in `value`.',
 
             'If *percent*, the bar lengths correspond to a percentage of',

src/traces/contour/attributes.js

@@ -226,11 +226,11 @@ module.exports = extendFlat({
                 'Sets the value or values of the constraint boundary.',
 
                 'When `operation` is set to one of the comparison values',
-                '(' + COMPARISON_OPS2 + ')',
+                '(`' + COMPARISON_OPS2 + '`)',
                 '*value* is expected to be a number.',
 
                 'When `operation` is set to one of the interval values',
-                '(' + INTERVAL_OPS + ')',
+                '(`' + INTERVAL_OPS + '`)',
                 '*value* is expected to be an array of two numbers where the first',
                 'is the lower bound and the second is the upper bound.',
             ].join(' ')