Update tests following the switch from m2r to mdinclude

Two kind of changes are required to adjust the tests after the move from
m2r to mdinclude for parsing Markdown.

- We need to slightly adjust the expected results for the
  uber.json/uber.yaml tests, because of minor differences in formatting
  between m2r and mdinclude (namely, spaces before/after the inserted
  role markers).

- Alas, we also need to adjust the base JSON/YAML files themselves,
  because it appears that mdinclude (itself or through its mistune
  dependency, I'm not sure, see [0] and [1]) does not support simple
  HTML tags without slash (e.g. "<div>...</div>" works, "<br />" too,
  but not simply "<br>").

[0] https://github.com/lepture/mistune/blob/693db5c/mistune/inline_parser.py#L32
[1] https://github.com/amyreese/sphinx-mdinclude/blob/3636e33fe83cfcfea14e70fd503777ceb11f4401/sphinx_mdinclude/parse.py#L62

tests/renderers/httpdomain/rendered/v2.0/uber.json.rst

@@ -40,7 +40,7 @@
       :format: html
 
 
-   The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.\ :raw-html-md:`<br>`\ :raw-html-md:`<br>`\ The response also includes low and high estimates, and the `ISO 4217 <http://en.wikipedia.org/wiki/ISO_4217>`_ currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.
+   The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.:raw-html-md:`<br />`:raw-html-md:`<br />`The response also includes low and high estimates, and the `ISO 4217 <http://en.wikipedia.org/wiki/ISO_4217>`_ currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.
 
    :queryparam start_latitude:
       Latitude component of start location.
@@ -158,7 +158,7 @@
       :format: html
 
 
-   The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.\ :raw-html-md:`<br>`\ :raw-html-md:`<br>`\ The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.
+   The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.:raw-html-md:`<br />`:raw-html-md:`<br />`The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.
 
    :queryparam offset:
       Offset the list of returned results by this amount. Default is zero.

tests/renderers/httpdomain/rendered/v2.0/uber.yaml.rst

@@ -40,7 +40,7 @@
       :format: html
 
 
-   The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.\ :raw-html-md:`<br>`\ :raw-html-md:`<br>`\ The response also includes low and high estimates, and the `ISO 4217 <http://en.wikipedia.org/wiki/ISO_4217>`_ currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.
+   The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.:raw-html-md:`<br />`:raw-html-md:`<br />`The response also includes low and high estimates, and the `ISO 4217 <http://en.wikipedia.org/wiki/ISO_4217>`_ currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.
 
    :queryparam start_latitude:
       Latitude component of start location.
@@ -158,7 +158,7 @@
       :format: html
 
 
-   The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.\ :raw-html-md:`<br>`\ :raw-html-md:`<br>`\ The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.
+   The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.:raw-html-md:`<br />`:raw-html-md:`<br />`The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.
 
    :queryparam offset:
       Offset the list of returned results by this amount. Default is zero.

tests/testspecs/v2.0/uber.json

@@ -61,7 +61,7 @@
     "/estimates/price": {
       "get": {
         "summary": "Price Estimates",
-        "description": "The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.<br><br>The response also includes low and high estimates, and the [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217) currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.",
+        "description": "The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.<br /><br />The response also includes low and high estimates, and the [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217) currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.",
         "parameters": [
           {
             "name": "start_latitude",
@@ -201,7 +201,7 @@
     "/history": {
       "get": {
         "summary": "User Activity",
-        "description": "The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.<br><br>The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.",
+        "description": "The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.<br /><br />The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.",
         "parameters": [
           {
             "name": "offset",

tests/testspecs/v2.0/uber.yaml

@@ -55,7 +55,7 @@ paths:
   /estimates/price:
     get:
       summary: Price Estimates
-      description: The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.<br><br>The response also includes low and high estimates, and the [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217) currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.
+      description: The Price Estimates endpoint returns an estimated price range for each product offered at a given location. The price estimate is provided as a formatted string with the full price range and the localized currency symbol.<br /><br />The response also includes low and high estimates, and the [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217) currency code for situations requiring currency conversion. When surge is active for a particular product, its surge_multiplier will be greater than 1, but the price estimate already factors in this multiplier.
       parameters:
         - name: start_latitude
           in: query
@@ -151,7 +151,7 @@ paths:
   /history:
     get:
       summary: User Activity
-      description: The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.<br><br>The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.
+      description: The User Activity endpoint returns data about a user's lifetime activity with Uber. The response will include pickup locations and times, dropoff locations and times, the distance of past requests, and information about which products were requested.<br /><br />The history array in the response will have a maximum length based on the limit parameter. The response value count may exceed limit, therefore subsequent API requests may be necessary.
       parameters:
         - name: offset
           in: query