Unescape HTML-escaped apostrophes in regression test artefacts

Since #2098 & #2112, apostrophes rendered via `SmartAnswer::ErbRenderer` have
not been HTML-escaped. Now that we are rendering question content via this
renderer, we need to update the regression test artefacts for question pages
accordingly.

I ran the following commands to do this:

    $ find test/artefacts/calculate-married-couples-allowance -name '*.html' | xargs sed -i .bak "s/'/'/g"
    $ git clean -fd test/artefacts/calculate-married-couples-allowance/**/*.bak

Author: floehopper

test/artefacts/calculate-married-couples-allowance/yes.html

@@ -37,7 +37,7 @@ <h2>
   <div class="question-body">
 
 
-      <p class="hint">Before this date the husband&#39;s income is used to work out your allowance, after this date it&#39;s the income of the highest earner.</p>
+      <p class="hint">Before this date the husband's income is used to work out your allowance, after this date it's the income of the highest earner.</p>
 
     <div class="">
 

test/artefacts/calculate-married-couples-allowance/yes/no.html

@@ -32,7 +32,7 @@ <h1>
         <div class="current-question" id="current-question">
             <div class="question">
   <h2>
-    What&#39;s the highest earner&#39;s date of birth?
+    What's the highest earner's date of birth?
   </h2>
   <div class="question-body">
 

test/artefacts/calculate-married-couples-allowance/yes/no/1955-01-01.html

@@ -32,12 +32,12 @@ <h1>
         <div class="current-question" id="current-question">
             <div class="question">
   <h2>
-    What&#39;s the highest earner&#39;s yearly income?
+    What's the highest earner's yearly income?
   </h2>
   <div class="question-body">
 
 
-      <p class="hint">Add up your taxable income, eg earnings, pensions and any taxable benefits, eg Carer&#39;s Allowance.</p>
+      <p class="hint">Add up your taxable income, eg earnings, pensions and any taxable benefits, eg Carer's Allowance.</p>
 
     <div class="">
 
@@ -91,13 +91,13 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the highest earner&#39;s date of birth?</td>
+    <td class="previous-question-title">What's the highest earner's date of birth?</td>
       <td class="previous-question-body">
        1 January 1955</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/no?previous_response=1955-01-01">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the highest earner&#39;s date of birth?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the highest earner's date of birth?"</span>
 </a>      </td>
   </tr>
 

test/artefacts/calculate-married-couples-allowance/yes/yes.html

@@ -32,7 +32,7 @@ <h1>
         <div class="current-question" id="current-question">
             <div class="question">
   <h2>
-    What&#39;s the husband&#39;s date of birth?
+    What's the husband's date of birth?
   </h2>
   <div class="question-body">
 

test/artefacts/calculate-married-couples-allowance/yes/yes/1950-01-01.html

@@ -32,7 +32,7 @@ <h1>
         <div class="current-question" id="current-question">
             <div class="question">
   <h2>
-    What&#39;s the husband&#39;s yearly income?
+    What's the husband's yearly income?
   </h2>
   <div class="question-body">
 
@@ -91,13 +91,13 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s date of birth?</td>
+    <td class="previous-question-title">What's the husband's date of birth?</td>
       <td class="previous-question-body">
        1 January 1950</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes?previous_response=1950-01-01">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s date of birth?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's date of birth?"</span>
 </a>      </td>
   </tr>
 

test/artefacts/calculate-married-couples-allowance/yes/yes/1950-01-01/27001.0/yes.html

@@ -97,25 +97,25 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s date of birth?</td>
+    <td class="previous-question-title">What's the husband's date of birth?</td>
       <td class="previous-question-body">
        1 January 1950</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes?previous_response=1950-01-01">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s date of birth?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's date of birth?"</span>
 </a>      </td>
   </tr>
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s yearly income?</td>
+    <td class="previous-question-title">What's the husband's yearly income?</td>
       <td class="previous-question-body">
       £27,001</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes/1950-01-01?previous_response=27001.0">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s yearly income?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's yearly income?"</span>
 </a>      </td>
   </tr>
 

test/artefacts/calculate-married-couples-allowance/yes/yes/1950-01-01/27001.0/yes/10000.0/5000.html

@@ -91,25 +91,25 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s date of birth?</td>
+    <td class="previous-question-title">What's the husband's date of birth?</td>
       <td class="previous-question-body">
        1 January 1950</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes?previous_response=1950-01-01">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s date of birth?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's date of birth?"</span>
 </a>      </td>
   </tr>
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s yearly income?</td>
+    <td class="previous-question-title">What's the husband's yearly income?</td>
       <td class="previous-question-body">
       £27,001</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes/1950-01-01?previous_response=27001.0">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s yearly income?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's yearly income?"</span>
 </a>      </td>
   </tr>
 

test/artefacts/calculate-married-couples-allowance/yes/yes/1950-01-01/27001.0/yes/10000.html

@@ -91,25 +91,25 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s date of birth?</td>
+    <td class="previous-question-title">What's the husband's date of birth?</td>
       <td class="previous-question-body">
        1 January 1950</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes?previous_response=1950-01-01">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s date of birth?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's date of birth?"</span>
 </a>      </td>
   </tr>
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s yearly income?</td>
+    <td class="previous-question-title">What's the husband's yearly income?</td>
       <td class="previous-question-body">
       £27,001</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes/1950-01-01?previous_response=27001.0">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s yearly income?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's yearly income?"</span>
 </a>      </td>
   </tr>
 

test/artefacts/calculate-married-couples-allowance/yes/yes/1950-01-01/27001.html

@@ -103,25 +103,25 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s date of birth?</td>
+    <td class="previous-question-title">What's the husband's date of birth?</td>
       <td class="previous-question-body">
        1 January 1950</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes?previous_response=1950-01-01">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s date of birth?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's date of birth?"</span>
 </a>      </td>
   </tr>
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the husband&#39;s yearly income?</td>
+    <td class="previous-question-title">What's the husband's yearly income?</td>
       <td class="previous-question-body">
       £27,001</td>
 
       <td class="link-right">
           <a href="/calculate-married-couples-allowance/y/yes/yes/1950-01-01?previous_response=27001.0">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the husband&#39;s yearly income?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the husband's yearly income?"</span>
 </a>      </td>
   </tr>